小升初四则混合运算380题(精选)
害怕的近义词-赛龙舟作文
小升初真题混合运算专项练习(有答案)
1.(2012•瑶海区)基本计算:
①428÷[32÷(4+4)]
②127×8÷127×8.
2.(2012•武胜县)计算.
9080﹣35×26
17÷3.4+1.48
÷( ﹣)×( +)
3÷÷÷4
(+)÷+
10÷[﹣( ÷+)].
3.(2012•武胜县)计算,能简算的要简算.
2004+75×54÷45
(0.125×8﹣0.5)×4
32%×76.4+1.36×3.2
×+÷
小升初真题混合运算----
( ﹣)×( +)
1110÷[56×( ﹣)]
4.(2012•武胜县)计算.
(108÷25)×(75÷18)
3.5×(20.6﹣16.8÷4.8)
( ﹣)×( +)
×[7﹣4÷( +)].
5.(2012•万州区)计算:
9﹣5.4= 780÷26=
3.14×3= 27×=
625﹣199= 10+0.1=
0÷= 9.42×0.1=
﹣=
0.4
2
=
1÷= 1﹣+=
6.(2012•桐庐县)计算.
①92×13+28
②4.2÷1.5﹣0.36
③78×
1
④1÷﹣÷1
⑤×5÷×5
⑥2﹣
⑦36×(+)
7.(2012•天柱县)脱式计算.
3060÷15﹣25×1.04
×÷+
(+)×(
×[﹣(﹣)].
÷5)
÷
③16×+4×
④(7.5﹣7.5×0.6)÷4
⑤(
⑥.
+÷3)×
10.(2012•顺昌县)脱式计算.(能简算的要简算)
①14×75﹣624÷39
②÷9+×
③+(﹣)÷
④÷[﹣(1﹣)].
8.(2012•桃源县)脱式计算.
99×87+87
18.7﹣3.375﹣6.625
5×(+0.5)÷2
÷[(﹣)÷].
11.(2012•泉州)用递等式计算
(1)1379+450÷18×40
(2)(3.2÷16+10.8)÷22
(3)
(4)×÷( ﹣ )
12.(2012•硚口区)脱式计算.(友情提醒:有的可以
简算)
800﹣608÷32×5
3.68﹣3.6×0.2+0.18
×+×
9.(2012•苏州)计算下面各题,能简算的要简算.
①630÷18×24
②0.7+3.9+4.3+6.1
小升初真题混合运算----
2
48×9.9+48×0.1
(1﹣)÷0.25×4
(6﹣6×)÷12.
13.(2012•吉水县)脱式计算,能简算的要简算.
97÷1+35.6+0×6
1375+450÷15×25
[4.5+(13×+13×)]÷
48×+48×+48×8
(3)×
(4)(+)÷﹣
÷15
(5)3.9×9.77+0.23×3.9
(6)+(﹣)×.
16.(2011•漳州)计算下面各题,怎样简便就怎样计算.
420÷216÷18×17
25×12.5×32
×
40÷[×(+)]
17.(2011•游仙区)用自己喜欢的方法算
(315+285)÷(315﹣255)
5﹣(÷
(+﹣)×36
3.3×+0.75×3.7+75%×3.
18.(2011•永州)下面各题,怎样简便就怎样计算.
405×(20﹣172÷43)
+)
+÷
94.47﹣(94.47﹣86.555)
3.42×76.3+76.3×5.76+9.18×23.7.
14.(2012•洪山区)能简便的要用简便方法计算,写
出主要过程
(1)360+240÷15×28
(2)6÷2.4﹣0.3×1.4
(3)×6+6×
(4)(﹣0.4)÷×.
15.(2012•凤阳县)用递等式计算,能简算的要简算
(1)43×8﹣420÷15
(2)+2
++3
小升初真题混合运算----
3
×+×
17.31﹣6.15﹣3.85
÷[×(﹣)].
(3)×29﹣8×
(4)(+﹣)÷.
19.(2011•武昌区)递等式计算:
360﹣225÷15×18
÷×
22.(2011•南县)下面各题,能简算的要简算.(能简
算的要写出主要简算过程)
109×x+109×x
9.5﹣(4.6+5.8)÷1.3
23.(2011•金堂县)用自己喜欢的方式计算下面各题(要
写出主要的解答过程)
(1)3600﹣800÷40×35
(2)64﹣15.8﹣14.2
(3)
(4)
(5)
4.72﹣1.16﹣2.84
+÷+.
20.(2011•田东县)计算下列各题.
860﹣560÷8×7
(5.9+1.65)÷2.5
(+)×20÷
÷[(+)×].
21.(2011•瑞安市)
(1)360+24÷15×30
(2)0.25×7.2+2.8÷0.5
(6)38÷[2.5×(4.36+3.64)].
24.(2011•淮南)选择合适的方法计算(要写出主要的
计算过程).
6760÷13+17×21
小升初真题混合运算----
4
3.33×4.5+4.5×6.67
.
25.(2011•河西区)脱式计算.(能简算的要简算)
53×13+21
1.65×45+55×1.65
÷[1﹣(+)].
26.(2011•河池)用你喜欢的方法计算.
25×12﹣850÷17
0.25×99+25%
6÷7﹣
()×13+4÷17.
72×(﹣)
28.(2011•丰都县)脱式计算
(384+336)÷15×13
(11+30.6)÷16+16.5
2﹣×
〔1﹣(+)〕÷.
﹣
29.(2010•自流井区)计算,能简便的要简便
(73.6÷0.16+370)×18
3.84÷+5.16×
.
30.(2010•雨花区)计算下列各题,能简便的要简便计
算
3618÷45+1620
67﹣67×(23+19)
200.8×73﹣6.3×2008
118÷(14+2.5×45)
99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1
27.(2011•海州区)神机妙算:
2842÷14+74×3
÷( ﹣)
3.6×99+3.6
÷( ×)
×+÷
小升初真题混合运算----
5
2008÷2.
31.(2012•咸安区)灵活计算
①
②
③
④.
⑤÷62.5%+×.
34.(2012•遂昌县)用递等式计算.
①[1﹣(+)]×36
②(+)×36
32.(2012•仙游县)神机妙算:
(+)×(﹣)
×
÷〔( ﹣)×3〕
(+)×12=
33.(2012•万州区)怎样算简便就怎样算.
①520+2613÷13
②×5×
③(+)÷+
④(+﹣)÷
③7.5×4.7+4.7×2.5
④25.3×12﹣33.46÷0.35
⑤×[÷(1﹣
⑥+(﹣)÷.
)]
+÷
35.(2012•绍兴县)递等式计算(能简便的要简算)
+÷
×+÷
(156×﹣26)×
2012+558÷18×24
3.87+1.44﹣0.87+0.56
小升初真题混合运算----
6
35×(1﹣)÷.
36.(2012•平坝县)用递等式计算,能简算的要简算.
÷﹣×
13.54﹣6.88﹣3.12
(+)÷+.
37.(2012•陕西)13×1+86.6÷.
38.(2012•瑞安市)脱式计算,能简算的要简算.
÷5+
(+﹣)×18.
39.(2012•乐清市)直接写得数.
﹣+0.375=
9×(0.5﹣)=
﹣=
12×(+)=
÷2÷=
小升初真题混合运算----
7
9﹣
﹣=
2÷﹣÷2=
90.5×99+90.5=
0.125×0.25×32=
40.(2012•金沙县)脱式计算,能简算的要简算
[25﹣(﹣)×12]÷5
×+×
÷
99×101
1.25×32×2.5
4.3×6.7+0.67×67﹣6.7.
41.(2012•建华区)计算下面各题.
657+360÷45×19
21×
28.6﹣(12.6+18.4)÷1.6
()÷.
42.(2012•河池)计算下面各题,怎样简便就怎样计算.
×++
﹣×﹣
÷﹢÷13.
43.(2012•河池)计算下面各题,怎样简便就怎样计算.
.
44.(2012•汉阳区)选择合适的方法计算.
2929÷29×34﹣1422
(
﹣(+)÷
+﹣)×24
÷÷
2﹣÷×
÷[56×(﹣)]
÷[1÷(﹣)]
47.(2012•福州)计算下面各题,能简便的要简便.
4÷1.25÷8
×(
+
÷〔1﹣(﹣)〕
×+×
÷
÷)
=
45.(2012•海港区)脱式计算
(+)÷+
9÷[1﹣()]
48.(2011•沿滩区)计算.
8470﹣104×65;
0.6×(5.3﹣1.7)÷0.9;
5.2÷0.8×6+42;
÷(﹣)×;
[﹣(﹣)]÷
.
1.02÷(5+0.4×0.25)
46.(2012•福州)用递等式计算,能简算的要简算
﹣+﹣=
小升初真题混合运算----
8
49.(2011•新邵县)下面各题,怎样算简便就怎样算
50.(2011•厦门)计算:
(1)(+
(2)[1﹣(+)]÷
(3)×﹣×.
)÷+
(15﹣14×)×
21×()
53.(2011•滑县)怎样简便就怎样算
+×3
5﹣﹣0.125
÷
[﹣(﹣)]÷.
+×
51.(2011•龙湾区)用递等式计算,能简便的要用简便
方法计算.
÷×5
5×(﹣)÷
48×(+﹣)
52.(2011•嘉禾县)用递等式计算下面各题:
÷9+×
54.(2011•福州)计算下列各题.(能简算的写出简算
过程)
(1)4.27×+4.73÷8+,
(2)(2.3+2.3+2.3+2.3)×2.5,
55.(2011•福安市)下面各题怎么简便怎么算.
×(
78÷[32×(1﹣)+144];
×﹣×;
﹣)÷;
小升初真题混合运算----
9
0.32×2.5×0.125.
56.(2011•东莞)选择你喜欢的方法进行计算:
×27﹣
÷(1﹣
9×4.25+4×
)×
×+×
(4)
(5)
(6)﹣﹣
59.(2011•北海).
÷.
÷[(+)×]
60.(2010•重庆)计算下面各题,能简算和要简算.
(+)÷
×(+)
6.28+5.74+3.72+5.26
61.(2012•康县)计算.(能简算的要简算)
1.9﹣1.9×(
×[1﹣(﹣)]
÷
)
(6﹣3)÷(13+11)
57.(2011•毕节地区)计算下面各题,要写出计算的主
要过程
.
58.(2011•巴中)计算下面各题,注意使用简便运算.
×÷
(1)
÷÷
(2)
48×
85×
小升初真题混合运算----
10
(3)(15﹣14×)×
÷23+×.
62.(2012•姜堰市)计算下面各题,能简便计算的用简
便方法计算.
4.82﹣5.2÷0.8×0.6
[﹣(﹣)]÷
×+×
12.3×99
57.5﹣14.25﹣15
3.2×12.5×0.25.
63.(2012•丰润区)用最喜欢的方法计算
12.5×38×0.8
(8.5﹣4)×(0.32÷1.6)
6.5×4.6+6.5×15.4
÷[].
÷[(+)×].
65.(2012•城厢区)计算下面各题,能简算的要简算
①96×(72﹣14.4)÷3.6
②(++)×12
③×36+36×
④[﹣(﹣)]÷.
66.(2011•温江区)计算.
(1)22.7﹣1.8+17.3﹣18.2
(2)3899+3737÷37
(3)385×6÷385×6
(4)
(5)
64.(2012•东城区)脱式计算.
0.6+32×0.25﹣6
小升初真题混合运算----
11
(6)38.4×13+30.8×26.
67.(2011•满洲里市)
计算下面各题,能简算的要简算.
6.8﹣1.36﹣0.64
(2.5×73)×0.4
+﹣+
0.25+++
32.5×1.7+32.5×9.3﹣32.5.
68.(2011•建华区)计算下面各题.
13.5﹣(6.9+6.1)÷2.6
15×
573+900÷36×15
()÷+.
69.(2011•邗江区)脱式计算.
(2.8+4.6)×(2.6﹣2.)
0.25×(32+64)÷0.6
÷[×(﹣
×[1﹣(﹣)].
70.(2010•云龙县)用递等式计算.
①3.6﹣2.8+6.4﹣7.2
)]
② ②
③(6.9﹣3.15)÷0.3×0.8 ④÷(×)﹣1.
④÷(×)﹣1.
71.(2010•徐闻县)计算下列各题,能简算的要简算
(1)()×36
(2)5.28﹣(2.56+0.44)+1.72
(3)
(4)25×12.5×32
(5)(5﹣4.75)÷(2×2.5﹣3)
(6)27÷7+43×(1﹣)
72.(2010•霞浦县)怎样算简便就怎样算.
20.3×16﹣4560÷15
2.5×0.125×32
6.3×
.
小升初真题混合运算----
12
73.(2010•双阳区)
(1)40.5÷0.81﹣16×2.4
(2)÷[×(﹣)
(3)6.72÷1.2
(4)18.1﹣5.7﹣4.3+1.9
(5)3.8×4.2+38×0.58
(6)1.25×9﹣1.25.
74.(2010•曲周县)选择你喜欢的方法计算.
3.6﹣2.8+6.4﹣7.2
6.3×
÷(+)×
×17+×23
+13.7÷15
76.(2010•龙湾区)用递等式计算,怎样简便就怎样算
(1)3.7﹣2.2+7.3﹣7.8
(2)375+450÷18×25
(3)2.9×+1.1×
(4)÷(﹣)
77.(2010•龙海市)选择合适的方法,计算下面各题.
18.7﹣4.375﹣6.625
920÷40﹢23×50
12×(+﹣)
4.4×+3.6÷1+0.75×2
78.
(2010•乐清市)
(1)4.5×9.9+0.1;
(2)16﹣+﹣;
75.(2010•萝岗区)计算.(写出解答过程,能应简便
方法的要用简便方法)
(1)(0.125×8﹣0.5)×4
(2)(+)÷﹣
(3)907+907×9﹣900
(4)9÷[+(﹣)]
(3)1.25×2.5×3.2;
(4)8.1÷(9﹣6.3×1.4);
(5)59+59×13+14×41.
79.(2009•重庆)脱式计算.
小升初真题混合运算----
13
30.5﹣40÷8×2.4
83.(2008•资中县)用递等式计算(能简算的请简算)
①7.6﹣4.8+8.4﹣5.2
1.6×+÷2.4
②4×0.8×2.5×1.25
8.5+[(﹣0.005×700)÷]
[2﹣(﹣1.5)÷]×. ③×+÷
80.(2009•宜昌)用自己喜欢的方法计算.
205﹣105×12÷45
1.05×(3.8﹣0.8)÷6.3
(+)÷
(+)÷50%
④1375﹣375÷15×18
⑤1.05×(3.8﹣0.8)÷6.3
⑥×〔(﹣)÷〕
884÷34+17×21
3.75×(1.2﹣)+.
81.(2009•淇滨区)计算:
45.78+45.78×99
3.6﹣2.8+7.4﹣7.2
×67+33×.
82.(2009•成都)1÷2.5+2.5×0.4+1.
小升初真题混合运算----
14
84.(2008•武进区)用递等式计算:
①0.6﹣0.2×1.9÷7.6;
②5÷﹣×;
③1.02÷(5+0.4×0.25);
④
⑤3÷×(﹣).
÷(+)×;
85.(2008•汕头)混合运算.(能简便的要写简便过程)
①4.5×8.8﹣2.2×4.5﹣4.5
②38﹣15.4+0.125﹣4.6
③
④.
①730﹣240÷15×16
②[2.06﹣(1.73﹣0.29)]×1.5
③÷[(+)×]
86.(2008•邗江区)用递等式计算,能简算的要简算
(1)18﹣10.4÷(6.2﹣4.9)
(2)
(3)2﹣
④6.8+2.37+7.63+4.2
⑤×17÷9+3÷8×.
(4)3.6÷0.4+1.3×5
(5)[6.85﹣(0.75+0.2)]÷0.5
(6)÷[56×()].
87.(2008•广西)灵活计算下面各题
(1)54.75﹣5.25﹣14.75
(2)16.4÷(4.3×2﹣0.4)
(3)1.25×32
(4)×[1﹣(﹣)]
88.(2008•大足县)脱式计算(其中④、⑤两小题必须
简算).
小升初真题混合运算----
15
89.(2007•浦东新区)
(1)13.72﹣1.65﹣2.35
(2)2.4+3.6÷1.2×0.2
(3)(12.5+1.25)×0.8
(4)5.4×7.2+2.8×5.4
(5)2÷(1.2﹣0.4×2.5)
(6)0.3×[(13.4﹣10)÷0.5+1.5].
90.(2008•长汀县)用递等式计算(能简算的要用简便
方法计算).
①20﹣﹣
②9.07×99+9.07
③+×÷2
④2.3+3.91÷(22﹣19.7)
⑤×[﹣(﹣)].
小升初真题混合运算----
16
参考答案:
1.①428÷[32÷(4+4)],
=428÷[32÷8],
=428÷4,
=107;
②127×8÷127×8,
=127÷127×8×8,
=8×8,
=64
2.(1)9080﹣35×26,
=9080﹣910,
=8170;
(2)17÷3.4+1.48,
=5+1.48,
=6.48;
(3)÷(﹣)×(+),
3.(1)2004+75×54÷45,
=2004+4050÷45,
=2004+90,
=2094;
(2)(0.125×8﹣0.5)×4,
=(1﹣0.5)×4,
=0.5×4,
=2;
(3)32%×76.4+1.36×3.2,
=32%×76.4+13.6×0.32
=0.32×(76.4+13.6),
=0.32×90,
=28.8;
(4)×
=
=
+,
;
)×( +),
+÷,
=÷×
=×(×
=×
=;
,
,
(5)(
﹣
),
=
=
×
;
,
(6)1110÷[56×( ﹣)],
(4)3÷÷÷4,
=1110÷[56×﹣56×],
=9×÷4,
=12÷4,
=3;
(5)(+)÷+,
=
=
=
×
+,
;
﹣( ÷
+)],
=×
=10÷[
=10÷
=81
小升初真题混合运算----
17
=1110÷[24﹣21],
=1110÷3,
=370
4.(1)(108÷25)×(75÷18),
=×, ,
(6)10÷[
=10÷[
+)],
=18;
(2)3.5×(20.6﹣16.8÷4.8),
=3.5×(20.6﹣3.5),
=3.5×17.1,
=59.85;
(3)(﹣)×(+),
﹣(
﹣
,
,
],
=;
×[7﹣4÷(
+)], (4)
=
=
=
=
×[7﹣4÷],
×[7﹣4×],
×[7﹣5],
×2,
⑥2﹣÷
=2﹣,
=;
⑦36×(+)
=36×+36×,
=6+24,
=30.
7.(1)3060÷15﹣25×1.04
=204﹣26,
=178;
(2)×÷+
=.
5.9﹣5.4=3.6, 780÷26=30,
3.14×3=9.42, 27×=15,
625﹣199=426,
10+0.1=10.1,
0÷=0, 9.42×0.1=0.942,
﹣=, 0.4=0.16,
1÷=, 1﹣+=;
2
=×+,
=+,
=;
÷5)
6.①92×13+28
=1196+28,
=1224;
②4.2÷1.5﹣0.36
=2.8﹣0.36,
=2.44;
③78×
(3)(+)×(
=
=
×
;
×,
=(79﹣1)×
=79×
=3﹣
=2
﹣1×
,
,
(4)×[﹣(
,
=×[+﹣
=×,
],
﹣)].
;
=.
④1÷﹣÷1
=4﹣,
=3;
⑤×5÷×5
=×5×5,
=1×5×5,
=25;
8.(1)99×87+87,
=(99+1)×87,
=100×87,
=8700;
(2)18.7﹣3.375﹣6.625,
=18.7﹣(3.375+6.625),
=18.7﹣10,
=8.7;
(3)5×(+0.5)÷2,
小升初真题混合运算----
18
=5×÷2,
=6÷2,
=3;
(4)÷[(﹣)÷],
=÷[÷],
=÷,
=.
9.①630÷18×24,
=35×24,
=840;
②0.7+3.9+4.3+6.1,
=(0.7+4.3)+(6.1+3.9),
=5+10,
=15;
③16×+4×,
=(16+4)×,
=20×,
=8;
④(7.5﹣7.5×0.6)÷4,
=(7.5﹣4.5)÷4,
=3÷4,
=0.75;
⑤(+÷3)×,
=(+×)×,
=(+)×,
=,
=;
⑥[()],
=×[÷()],
=×[],
=[],
=,
=1
10.①14×75﹣624÷39
=1050﹣16,
=1034;
②÷9+×
=×+×,
=(+)×,
=×,
=;
③+(﹣)÷
=+×,
=+,
=;
④÷[﹣(1﹣)].
=÷[﹣],
=,
=.
11.(1)1379+450÷18×40,
=1379+25×40,
=1379+1000,
=2379;
(2)(3.2÷16+10.8)÷22,
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)×+×,
=(+)×,
=1×,
=;
小升初真题混合运算----
19
(4)×÷( ﹣ ),
=×÷,
=14.25×,
=8.55;
(4)48×
=××12,
=(
=×12×,
=3×,
=.
12.(1)800﹣608÷32×5,
=800﹣19×5,
=800﹣95,
=705;
(2)3.68﹣3.6×0.2+0.18,
=3.68﹣0.72+0.18,
=2.96+0.18,
=3.14;
(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=480;
(4)(1﹣)÷0.25×4,
=0.25÷0.25×4,
=1×4,
=4;
(5)(6﹣6×)÷12,
=(6﹣4)÷12,
=2÷12,
=.
13.(1)97÷1+35.6+0×6
=97+35.6+0,
=132.6;
(2)1375+450÷15×25
=1375+30×25,
=1375﹣750,
=625;
(3)[4.5+(13×+13×)]÷
=[4.5+(13××2)]÷,
=(+)+(3
=[4.5+9.75]÷,
=1+6,
=7;
小升初真题混合运算----
20
+48×+48×8
++8)×48,
=9×48,
=432;
(5)94.47﹣(94.47﹣86.555)
=94.47﹣94.47+86.555,
=0+86.555,
=86.555;
(6)3.42×76.3+76.3×5.76+9.18×23.7
=(3.42+5.76)×76.3+9.18×23.7,
=9.18×76.3+9.18×23.7,
=(76.3+23.7)×9.18,
=100×9.18,
=918
14.(1)360+240÷15×28,
=360+16×28,
=360+448,
=808;
(2)6÷2.4﹣0.3×1.4,
=2.5﹣0.42,
=2.08;
(3)×6+6×,
=(+)×6,
=1×6,
=6;
(4)(﹣0.4)÷×,
=÷×,
=×,
=
15.(1)43×8﹣420÷15,
=344﹣28,
=316;
(2)+2++3
+2
,
),
(3)×÷15,
=×,
=;
(4)(+)÷﹣,
=×﹣,
=﹣,
=;
(5)3.9×9.77+0.23×3.9
=3.9×(9.77+0.23),
=3.9×10,
=39;
(6)+(﹣)×,
=+×,
=+,
=.
16.(1)420÷216÷18×17,
=÷18×17,
=×17,
=;
(2)25×12.5×32,
=25×12.5×8×4,
=(25×4)×(12.5×8),
=100×100,
=10000;
(3)×+÷,
=×+×,
=(+)×,
=1×,
=;
(4)40÷[×(+)],
=40÷[×],
=40÷,
=80
17.(1)(315+285)÷(315﹣255),
=600÷60,
=10;
(2)5﹣(÷+),
=5﹣(4),
=5﹣4﹣,
=;
(3)(+﹣)×36,
=×36+×36﹣×36,
=9+6﹣12,
=3;
(4)3.3×+0.75×3.7+75%×3,
=(3.3+3.7+3)×0.75,
=10×0.75,
=7.5
18.①405×(20﹣172÷43),
=405×16,
=6480;
②×+×,
=×(+),
=;
③17.31﹣6.15﹣3.85,
=17.31﹣(6.15+3.85),
=17.31﹣10,
=7.31.
④÷[×(﹣)],
=÷[×],
小升初真题混合运算----
21
=×,
=3
19.(1)360﹣225÷15×18,
=360﹣15×18,
=360﹣270,
=90;
(2)÷×,
=×,
=;
(3)4.72﹣1.16﹣2.84,
=4.72﹣(1.16+2.84),
=4.72﹣4,
=0.72;
(4)+÷+,
=++,
=++,
=1+,
=1.
20.860﹣560÷8×7
=860﹣70×7,
=860﹣490,
=370;
(5.9+1.65)÷2.5
=7.55÷2.5,
=3.02
(+)×20÷
=(×20+×20),
=(15+16)×,
=31×,
=21;
÷[(+)×].
=÷[×],
=,
=.
21.(1)360+24÷15×30,
=360+×30,
=360+48,
=408;
(2)0.25×7.2+2.8÷0.5,
=1.8+5.6,
=7.4;
(3)×29﹣8×,
=×(29﹣8),
=×21,
=9;
(4)(+﹣)÷,
=(+﹣)×24,
=×24+×24﹣×24,
=20+21﹣10,
=41﹣10,
=31
22.(1)109×x+109×x,
=(109+109)×x,
=218x;
(2)9.5﹣(4.6+5.8)÷1.3,
=9.5﹣10.4÷1.3,
=9.5﹣0.8,
=8.7;
(3),
=÷+,
=+,
=.
23.(1)3600﹣800÷40×35,
=3600﹣20×35,
=3600﹣700,
=2900;
小升初真题混合运算----
22
(2)64﹣15.8﹣14.2,
=64﹣(15.8+14.2),
=64﹣30,
=34;
(3)
=(40﹣27)×
=13×
=9;
(4)
=×36﹣×36+
,
×36,
,
,
,
25.(1)53×13+21,
=689+21,
=710;
(2)1.65×45+55×1.65,
=1.65×(45+55),
=1.65×100,
=165;
(3)÷[1﹣(+)],
=÷[1﹣],
=
=.
26.(1)25×12﹣850÷17,
=300﹣50,
=250;
(2)0.25×99+25%,
=0.25×(99+1),
=0.25×100,
=25;
(3)6÷7﹣
=﹣,
=;
(4)(
=
=
=<
br>=
=2
×13+
+
+(
+1,
.
+
+
)×13+4÷17,
×13+4÷17,
,
),
,
,
=15﹣6+14,
=9+14,
=23;
(5)
=(18﹣5+1)×
=14×,
,
,
=9;
(6)38÷[2.5×(4.36+3.64)],
=38÷[2.5×8],
=38÷20,
=1.9
24.(1)6760÷13+17×21,
=520+357,
=877;
(2)3.33×4.5+4.5×6.67
=(3.33+6.67)×4.5,
=10×4.5,
=45;
(3)(+)÷(﹣
=
=;
×],
,
)
(4)
=12÷[
27.(1)2842÷14+74×3
=2848÷7÷2+74×3,
=203+222,
=425;
(2)÷( ﹣)
=×12, =12÷,
=48.
小升初真题混合运算----
23
=10;
(3)3.6×99+3.6
=(99+1)×3.6,
=100×3.6,
=360;
(4)÷( ×)
=×,
=;
(5)×+÷
=×+×,
=(+)×,
=1×,
=;
(6)72×(﹣)
=72×﹣72×,
=40﹣30,
=10
28.(1)(384+336)÷15×13,
=720÷15×13,
=48×13,
=624;
(2)(11+30.6)÷16+16.5,
=41.6÷16+16.5,
=2.6+16.5,
=19.1;
(3)2﹣×﹣,
=2﹣﹣,
=2﹣(+),
=2﹣1,
=2;
(4)[1﹣(+)]÷,
=[1﹣]÷,
=÷,
=.
29.(1)(73.6÷0.16+370)×18,
=(460+370)×18,
=830×18,
=14940;
(2)3.84÷+5.16×,
=3.84×+5.16×,
=(3.84+5.16)×,
=9×,
=12;
(3),
=7.35﹣﹣0.35﹣,
=(7.35﹣0.35)﹣(+),
=7﹣,
=6;
(4)2.5×(+++),
=2.5×(×4),
=(2.5×4)×,
=10×,
=.
30.(1)3618÷45+1620,
=80.4+1620,
=1700.4;
(2)67﹣67×(23+19),
=67×(1﹣23﹣19),
=67×(﹣41),
=﹣2747;
(3)200.8×73﹣6.3×2008,
=2008×7.3﹣6.3×2008,
=(7.3﹣6.3)×2008,
=1×2008,
=2008;
小升初真题混合运算----
24
(4)118÷(14+2.5×45),
=118÷(14+112.5),
=118÷126.5,
=;
32. (1)(+)×(﹣),
=×
=;
×
+
+
+
×
÷
,
),
,
,
(5)99﹣97+95﹣93+91﹣89+…+7﹣5+3﹣1,
=2+2+…2+2,
=2×25,
=50.
(6)2008÷2=
31.(1)
=﹣+,
,
;
(2)
=
=
=
=
×
×(
×1,
;
=(+)
=1﹣,
,
(3)÷[( ﹣)×3],
=÷[×3],
=;
=÷,
(2)75﹣25×,
=;
=75×﹣25×,
(4)(+)×12,
=(75﹣25)×,
=×12+×12,
=50×,
=30;
(3)
=×14+×14﹣
,
=×
=5+13×
=5+4,
=9;
(4)
=
=
=
÷+,
=
+,
=+,
=1;
+,
,
③(+)÷+,
,
=×5,
×5,
,
,
=4+9,
=13
33.①520+2613÷13,
=520+201,
=721;
②×5×
=5+(14﹣1)×
,
=;
小升初真题混合运算----
25
④(+﹣)÷,
=(+﹣)×42,
=×42+×42﹣×42,
=28+24﹣7,
=52﹣7,
=45;
⑤÷62.5%+×,
=×+×,
=(+)×,
=1×,
=
34.①[1﹣(+)]×36,
=[1﹣(+)]×36,
=[1﹣]×36,
=×36,
=;
②(+)×36,
=36×,
=8+21,
=29;
③7.5×4.7+4.7×2.5,
=4.7×(7.5+2.5),
=4.7×10,
=47;
④25.3×12﹣33.46÷0.35,
=303.6﹣95.6,
=208;
⑤×[÷(1﹣)],
=×[÷],
=[],
=×5,
=4;
⑥+(﹣)÷,
=+(﹣)×2,
=+×2,
=+,
=.
35.(1)+÷,
=+,
=;
(2)×+÷,
=×+×,
=×(+),
=×1,
=;
(3)(156×﹣26)×,
=(48﹣26)×,
=22×,
=16;
(4)2012+558÷18×24,
=2012+31×24,
=2012+744,
=2756;
(5)3.87+1.44﹣0.87+0.56,
=(3.67﹣0.87)+(1.44+0.56),
=3﹣2,
=1;
(6)35×(1﹣)÷,
=35×÷,
小升初真题混合运算----
26
=20,
=48
36.(1)÷﹣×,
=4﹣,
=3;
(2)13.54﹣6.88﹣3.12,
=13.54﹣(6.88+3.12),
=13.54﹣10,
=3.54;
(3)(+)÷+,
=,
=,
=2
37.13×1+86.6÷
=13.4×+86.6×,
=(13.4+86.6)×1.25,
=100×1.25,
=125
38.(1)÷5+,
=()×,
=,
=;
(2)÷,
=[],
=,
=;
(3)(+﹣)×18,
=×18+×18﹣×18,
=9+6﹣3,
=15﹣3,
=12
﹣+0.375=,
39.
9×(0.5﹣)=1.5,
﹣=,
12×(+)=5,
÷2÷=,
9﹣﹣=8
2÷﹣÷2=2,
90.5×99+90.5=9050
0.125×0.25×32=1.
40.
(1)[25﹣(﹣)×12]÷5,
=[25﹣×12]÷5,
=(25﹣3)÷5
=22,
=4;
(2)×+×,
=×+×,
=(+)×,
=1×,
=;
(3)99×101,
=99×(100+1),
=99×100+99×1,
=9900+99,
=9999;
(4)1.25×32×2.5,
=1.25×(4×8)×2.5,
=(1.25×8)×(2.5×4),
=10×10,
=100;
(5)4.3×6.7+0.67×67﹣6.7,
小升初真题混合运算----
27
=4.3×6.7+6.7×6.7﹣6.7,
=(4.3+6.7﹣1)×6.7,
=10×6.7,
=67
41.(1)657+360÷45×19,
=657+8×19,
=657+152,
=809;
(2)21×
=21×××
=(21×
=8×
=;
,
,
=;
÷﹢÷13,
,
(3)
=
=(
×+×
+)×,
=1×,
=
43.(1)
=35×
=20×
=48;
(2)
=(48﹣26)×
=22×,
,
,
,
,
, )×(×),
,
(3)28.6﹣(12.6+18.4)÷1.6,
=28.6﹣31÷1.6,
=28.6﹣19.375,
=9.225;
(4)(
=÷
)÷
,
,
=16;
(3)
=×
=×(
=×1,
=
44.(1)2929÷29×34﹣1422,
=101×34﹣1422,
=3434﹣1422,
=2012;
+×
+
,
),
, =2+,
=2.
42.(1)×++,
=
=
++,
++,
=2+,
=2;
(2)
=
=
=
﹣×﹣,
(2)
=
=
=2;
÷÷,
(
,
), ﹣﹣,
﹣(+),
﹣1,
小升初真题混合运算----
28
(3)(+﹣)×24,
=×24+×24﹣×24,
=2+6﹣8,
=8﹣8,
=0;
(4)﹣(+)÷,
=,
=,
=
45.(1)(+)÷+,
=,
=,
=;
(2)9÷[1﹣()],
=9÷[1﹣],
=9÷,
=27;
(3)1.02÷(5+0.4×0.25),
=1.02÷(5+0.1),
=1.02÷5.1,
=0.2
46.(1)﹣+﹣,
=+﹣(+),
=﹣1,
=;
(2)2﹣÷×,
=2﹣××,
=2﹣,
=;
(3)÷[56×(﹣)],
=÷[56×﹣56×],
=÷[24﹣21],
=÷3,
=×,
=;
(4)÷[1÷(﹣)],
=÷[1÷],
=÷,
=×,
=;
47.(1)4÷1.25÷8,
=4÷(1.25×8),
=4÷10,
=0.4;
(2)×(÷),
=×,
=;
(3)+÷,
=+,
=2;
(4)÷[1﹣(﹣)],
=÷[1﹣],
=÷,
=;
(5)×+×,
小升初真题混合运算----
29
=×(
=×1,
=
48.(1)8470﹣104×65,
=8470﹣(100+4)×65,
=8470﹣100×65﹣4×65,
=8470﹣6500﹣260,
=1710;
(2)0.6×(5.3﹣1.7)÷0.9,
+), =×,
=;
(3)4÷﹣÷4,
=5﹣,
=4;
(4)÷[(﹣)×],
=0.6×3.6÷0.9,
=0.6×(3.6÷0.9),
=0.6×4,
=2.4;
(3)5.2÷0.8×6+42,
=39+42,
=81;
(4)÷(﹣)×,
=÷×,
=××,
=;
(5)[﹣(﹣)]÷,
=[﹣]÷,
=×,
=.
49.(1)2﹣÷﹣,
=2﹣﹣,
=2﹣(+),
=2﹣1,
=1;
(2)×﹣÷,
=×﹣×,
=(﹣)×,
=÷[×],
=÷,
=
50.(1)(+)÷+
=×+,
=,
=2;
(2)[1﹣(+)]÷
=[1﹣]×,
=×,
=;
(3)×﹣×
=,
=.
51.(1)÷×5,
=×5,
=;
(2)÷9+×,
=×+×,
小升初真题混合运算----
30
=×(+),
=×1,
=;
(3)5×(﹣)÷,
=5×÷,
=×,
=;
(4)48×(+﹣),
=48×+48×﹣48×,
=16+12﹣24,
=28﹣24,
=4
52.(1)10÷+×4,
=10×+×4,
=18+,
=18;
(2)×+×,
=×(+),
=×1,
=;
(3)(15﹣14×)×,
=(15﹣8)×,
=7×,
=;
(4)21×(),
=21××21,
=3+14,
=17
53.(1)+×3,
=+,
=;
(2)5﹣﹣0.125,
=5﹣(0.875+0.125),
=5﹣1,
=4;
(3)÷+×,
=×+×,
=(+)×,
=1×,
=;
(4)[﹣(﹣)]÷,
=[﹣]÷,
=÷,
=
54.(1)4.27×+4.73÷8+,
=4.27×+4.73×+,
=(4.27+4.73+1)×,
=10×,
=;
(2)(2.3+2.3+2.3+2.3)×2.5,
=2.3×4×2.5,
=2.3×(4×2.5),
=2.3×10,
=23
55.(1)×(﹣)÷
小升初真题混合运算----
31
=××2,
=;
(2)78÷[32×(1﹣)+144]
=78÷[32×+144],
=78÷[12+144],
=78÷156,
=0.5;
(3)×﹣×
=(﹣)×,
=×,
=;
(4)0.32×2.5×0.125
=0.4×0.8×2.5×0.125,
=(0.4×2.5)×(0.8×0.125),
=1×0.1,
=0.1
56.(1)×27﹣
=(27﹣1)×,
=26×,
=18;
(2)÷(1﹣)×
=÷×,
=;
(3)9×4.25+4×
=9×4.25+4.25×,
=(9+)×4.25,
=10×4.25,
=42.5;
(4)(6﹣3)÷(13+11)
=÷,
=
57.(1)(1﹣×70)÷,
=(1﹣)×,
=×,
=;
(2)÷[×(+)],
=÷[×],
=÷,
=×,
=
58.(1)×÷,
=××,
=;
(2)÷÷,
=××,
=;
(3)(15﹣14×)×,
=(15﹣8)×,
=7×,
=;
(4)×+×,
=(+)×,
=1×,
=;
小升初真题混合运算----
32
(5)÷[(+)×
=÷[
=÷
=×
=3;
(6)﹣﹣
=﹣﹣
÷,
×
,
=
,
=
=
×,
;(4)48×
,
×[1﹣],
],
], =÷,
=1;
(3)×[1﹣(﹣)],
×,
=48×+48×﹣48×
=12+8﹣4,
=16;
(5)85×,
,
=﹣﹣,
=﹣(+),
=﹣1,
=
59.2.7×﹣0.35=9﹣2=6
=(86﹣1)×
=86×
=85﹣
=84
(6)
=×
+
;
÷23+
+×
)×
,
﹣
60.(1)(+)÷,
=
=
×,
;
×(+),
,
×
,
(2)
=
=
×
;
=(
=1×
=.
(3)6.28+5.74+3.72+5.26,
=(6.28+3.72)+(5.74+5.26),
=10+11,
=21;
61.(1)1.9﹣1.9×(
=1.9﹣1.9×0,
=1.9﹣0,
=1.9;
(2)[1﹣(﹣)]÷
=[1﹣]÷,
,
),
62.(1)4.82﹣5.2÷0.8×0.6,
=4.82﹣6.5×0.6,
=4.82﹣3.9,
=0.92;
(2)[﹣(﹣)]÷
=[﹣
=÷
]÷
,
,
,
=;
(3)×
小升初真题混合运算----
33
+×,
=(+)×,
=1×,
=;
(4)12.3×99,
=12.3×(100﹣1),
=12.3×100﹣12.3×1,
=1230﹣12.3,
=1217.7;
(5)57.5﹣14.25﹣15,
=57.5﹣(14.25+15),
=57.5﹣30,
=27.5;
(6)3.2×12.5×0.25,
=8×0.4×12.5×0.25,
=(8×12.5)×(0.4×0.25),
=100×0.1,
=10
63.(1)12.5×38×0.8,
=(12.5×0.8)×38,
=10×38,
=380;
(2)(8.5﹣4)×(0.32÷1.6),
=4.5×0.2,
=0.9;
(3)6.5×4.6+6.5×15.4,
=6.5×(4.6+15.4),
=6.5×20,
=130;
(4)÷[÷(1﹣)],
=÷[÷],
=÷[×],
=÷,
=×,
=
64.(1)0.6+32×0.25﹣6,
=0.6+8﹣6,
=2.6;
(2)÷[(+)×],
=÷[×],
=÷,
=5.
65.①96×(72﹣14.4)÷3.6,
=96×57.6÷3.6,
=1536;
②(++)×12,
=×12+×12+×12,
=6+4+3,
=13;
③×36+36×,
=(+)×36,
=1×36,
=36;
④[﹣(﹣)]÷,
=[﹣]÷,
=×,
=.
66.
(1)22.7﹣1.8+17.3﹣18.2,
=(22.7+17.3)﹣(1.8+18.2),
=40﹣20,
=20;
(2)3899+3737÷37,
=3899+101,
=4000;
(3)385×6÷385×6,
=(385÷385)×(6×6),
=1×36,
=36;
(4),
=+×,
=+,
=;
小升初真题混合运算----
34
(5)
=8×4×1.25×,
=(8×1.25)×(4×),
=10×1,
=10;
(6)38.4×13+30.8×26,
=38.4×13+61.6×13,
=(38.4+61.6)×13,
=100×13,
=1300
67.①6.8﹣1.36﹣0.64
=6.8﹣(1.36+0.64),
=6.8﹣2,
=4.8;
②(2.5×73)×0.4,
=2.5×0.4×73,
=1×73,
=73;
③
=(
=;
=
④0.25+++,
),
=2;
④
=
=
=
=
×[1﹣(﹣)],
×[1﹣(
×[1﹣],
×,
.
)],
,
,
=
)+(),
=÷,
÷[×()],
,
(3)573+900÷36×15,
=573+25×15,
=573+375,
=948;
(4)(
=
=+
=
×+
,
)÷+
,
,
69.①(2.8+4.6)×(2.6﹣2),
=7.4×0.6,
=4.44;
②0.25×(32+64)÷0.6,
=0.25×96÷0.6,
=0.25×4×24÷0.6,
=24÷0.6,
=40;
③÷[×(﹣)],
=(0.25+0.75)+(
=1+1,
=2;
⑤32.5×1.7+32.5×9.3﹣32.5,
=32.5×(1.7+9.3﹣1),
=32.5×10,
=325
68.(1)13.5﹣(6.9+6.1)÷2.6,
=13.5﹣13÷2.6,
=13.5﹣5,
=8.5;
(2)15×
=3××
=2×
=;
小升初真题混合运算----
35
,
,
70.①3.6﹣2.8+6.4﹣7.2,
=(3.6+6.4)﹣(2.8+7.2),
=10﹣10,
=0;
②,
,
=7.2×[8÷0.4],
=7.2×20,
=144;
③(6.9﹣3.15)÷0.3×0.8,
=3.75÷0.3×0.8,
=12.5×0.8,
=10;
④÷(×)﹣1,
=÷﹣1,
=﹣,
=
=10;
③6.3×+6.3÷,
=6.3×+6.3×,
=6.3×(
=6.3;
④[()×
)×
],
,
],
],
),
=÷[(
71.(1)()×36,
=
=×36+×36+×36,
=12+6+4,
=22;
(2)5.28﹣(2.56+0.44)+1.72,
=5.28+1.72﹣3,
=7﹣3,
=4;
(3)
=()×,
,
=×
=1
[
73.(1)40.5÷0.81﹣16×2.4
=50﹣38.4,
=11.6;
(2)÷[×(﹣
=
=
[×
,
]
)
=1×,
=;
(4)25×12.5×32,
=24×4×12.5×8,
=100×100,
=10000;
(5)(5﹣4.75)÷(2×2.5﹣3),
=0.25÷2,
=0.125,
(6)27÷7+43×(1﹣),
=
=
,
,
=10
72.①20.3×16﹣4560÷15,
=324.8﹣304,
=20.8;
②2.5×0.125×32,
=(2.5×4)×(0.125×8),
=10×1,
小升初真题混合运算----
36
=10;
(3)6.72÷1.2
=6.72÷6÷0.2,
=1.12÷0.2,
=5.6;
(4)18.1﹣5.7﹣4.3+1.9
=(18.1+1.9)﹣(5.7+4.3),
=20﹣10,
=10;
(5)3.8×4.2+38×0.58
=3.8×4.2+3.8×5.8,
=(4.2+5.8)×3.8,
=10×3.8,
=38.
(6)1.25×9﹣1.25
=(9﹣1)×1.25,
=8×1.25,
=10
74. (1)3.6﹣2.8+6.4﹣7.2,
=(3.6+6.4)﹣(2.8+7.2),
=10﹣10,
=0;
(2)6.3×+13.7÷15,
=6.3×+13.7×,
=(6.3+13.7)×,
=20×,
=;
(3)÷(+)×,
=÷×,
=××,
=;
(4)×17+×23,
=×14+×23,
=×(14+23),
=×37,
=17
75.(1)(0.125×8﹣0.5)×4,
=0.125×8×4﹣0.5×4,
=4﹣2,
=2;
(2)(+)÷﹣,
=÷﹣,
=﹣,
=;
(3)907+907×9﹣900,
=907×(1+9)﹣900,
=907×10﹣900,
=9070﹣900,
=8170;
(4)9÷[+(﹣)],
=9÷[+],
=9÷,
=8
76.(1)3.7﹣2.2+7.3﹣7.8,
=(3.7+7.3)﹣(2.2+7.8),
=11﹣10,
=1;
(2)375+450÷18×25
=375+25×25
=375+625
=1000;
(3)2.9×+1.1×,
=(2.9+1.1)×,
=4×,
=;
(4)÷(﹣),
=÷,
=1.
77.(1)18.7﹣4.375﹣6.625,
=18.7﹣(4.375+6.625),
=18.7﹣11,
=7.7;
(2)920÷40﹢23×50,
=23+23×50,
=23+1150,
=1173;
(3)12×(+﹣),
=12×+12×﹣12×,
=3+2﹣4,
=1;
(4)4.4×+3.6÷1+0.75×2,
=4.4×+3.6×+×2,
=×(4.4+3.6+2),
=×10,
=
小升初真题混合运算----
37
78.(1)4.5×9.9+0.1,
=4.5×(10﹣0.1)+0.1,
=4.5×10﹣4.5×0.1+0.1,
=45﹣0.45+0.1,
=44.55+0.1,
=44.65;
(2)16﹣
=16﹣(
=16﹣1
=15;
(3)1.25×2.5×3.2,
=(1.25×8)×(2.5×0.4),
=10×1,
=10;
(4)8.1÷(9﹣6.3×1.4),
=8.1÷(9﹣8.82),
=8.1÷0.18,
=45;
(5)59+59×13+14×41,
=59×(13+1)+14×41,
=59×14+14×41,
=(59+41)×14,
=100×14,
=1400
79.(1)30.5﹣40÷8×2.4,
=30.5﹣12,
=18.5;
(2)1.6×+÷2.4,
,
+﹣
)
,
,
=8.5+,
=8.5+0.5,
=9;
(4)[2﹣(﹣1.5)÷
=[2﹣(﹣)×
=[2﹣×
=[2﹣
=×
]×
,
]×
,
]×
,
]×
,
,
=12.
80.①205﹣105×12÷45,
=205﹣105×12÷45,
=205﹣1260÷45,
=205﹣28,
=177;
②1.05×(3.8﹣0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;
③(+)÷,
=(
=
=
=;
)÷,
,
,
=1.6×+÷
=1.2+×
=1.2+0.5,
=1.7;
(3)8.5+[(
=8.5+[(
=8.5+[(
=8.5+[
=
8.5+[
,
④(+)÷50%,
,
=(),
=×2,
﹣0.005×700)÷],
=1;
﹣3.5)×],
﹣)×],
×﹣×],
﹣],
小升初真题混合运算----
38
⑤884÷34+17×21,
=26+357,
=383;
⑥3.75×(1.2﹣)+,
=3.75×()+,
=3.75×﹣3.75×,
=4.5﹣1.25+0.75,
=4
81.(1)45.78+45.78×99,
=45.78×(1+99),
=45.78×100,
=4578;
(2)3.6﹣2.8+7.4﹣7.2,
=(3.6+7.4)﹣(2.8+7.2),
=11﹣10,
=1;
(3)×67+33×,
=(67+33)×,
=100×,
=40
82.1÷2.5+2.5×0.4+1,
=0.4+1+1,
=2.4.
83.①7.6﹣4.8+8.4﹣5.2,
=(7.6+8.4)﹣(4.8+5.2),
=16﹣10,
=6;
②4×0.8×2.5×1.25,
=(4×2.5)×(0.8×1.25),
=10×10,
=100;
③×+÷,
=×+×,
=(+)×,
=1×,
=;
④1375﹣375÷15×18,
=1375﹣25×18,
=1375﹣450,
=925;
⑤1.05×(3.8﹣0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;
⑥×[(﹣)÷],
=×[÷],
=××,
=
84.①0.6﹣0.2×1.9÷7.6,
=0.6﹣0.38÷7.6,
=0.6﹣0.05,
=0.55;
②5÷﹣×,
=5×﹣×;
=7﹣
=6;
③1.02÷(5+0.4×0.25),
=1.02÷(5+0.1),
=1.02÷5.1,
=0.2;
④÷(+)×,
=÷×,
=××,
=×,
=;
⑤3÷×(﹣),
=3÷×,
=3××,
=4×,
=2
85.(1)4.5×8.8﹣2.2×4.5﹣4.5
=(8.8﹣2.2﹣1)×4.5,
=5.6×4.5,
=4.5×0.8×7,
=3.6×7,
=25.2;
小升初真题混合运算----
39
(2)38﹣15.4+0.125﹣4.6
=38.875﹣15.4+0.125﹣4.6,
=(38.875+0.125)﹣(15.4+4.6),
=39﹣20,
=19;
(3)
=
=(
=1×,
=;
(4)
=126×[
=126×,
],
×,
)×,
=5.9÷0.5,
=11.8;
(6)÷[56×()],
=÷[56×﹣56×],
=÷[24﹣21],
=÷3,
=
87.(1)54.75﹣5.25﹣14.75,
=54.75﹣(14.75+5.25),
=54.75﹣20,
=34.75;
(2)16.4÷(4.3×2﹣0.4),
=16.4÷(8.6﹣0.4),
=16.4÷8.2,
=2;
(3)1.25×32,
=(1.25×8)×4,
=10×4,
=40;
(4)×[1﹣(﹣)],
=×[1﹣],
=×,
=8
86.(1)18﹣10.4÷(6.2﹣4.9),
=18﹣10.4÷1.3,
=18﹣8,
=10;
(2),
=(+)﹣(+),
=2﹣1,
=1;
(3)2﹣
=2﹣××
=2﹣
=2﹣
=1
×
,
;
,
,
,
=.
88.①730﹣240÷15×16,
=730﹣256,
=474;
②[2.06﹣(1.73﹣0.29)]×1.5,
=[2.06﹣1.44]×1.5,
=0.62×1.5,
=0.93;
③
=
=
=
÷[(
÷[×
+)×
],
],
(4)3.6÷0.4+1.3×5,
=9+1.3×5,
=9+6.5,
=15.5;
(5)[6.85﹣(0.75+0.2)]÷0.5,
=[6.85﹣0.95]÷0.5,
小升初真题混合运算----
40
÷,
×6,
=;
④6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
=11+10,
=21;
⑤×17÷9+3÷8×
=×17×+3××
=×+×,
,
,
③+×÷2,
=+÷2,
=+,
,
=;
=(+)×
=
④2.3+3.91÷(22﹣19.7),
=2.3+3.91÷2.3,
=2.3+1.7,
=4;
⑤×[﹣(
=×[﹣
=×
=.
,
﹣)],
89.(1)13.72﹣1.65﹣2.35,
=13.72﹣(1.65+2.35),
=13.72﹣4,
=9.72;
(2)2.4+3.6÷1.2×0.2,
=2.4+3×0.2
=2.4+0.6,
=3;
(3)(12.5+1.25)×0.8,
=12.5×0.8+1.25×0.8,
=10+1,
=11;
(4)5.4×7.2+2.8×5.4
=(7.2+2.8)×5.4,
=10×5.4,
=54;
(5)2÷(1.2﹣0.4×2.5)
=2÷(1.2﹣1),
=2÷0.2,
=10;
(6)0.3×[(13.4﹣10)÷0.5+1.5]
=0.3×[3.4÷0.5+1.5],
=0.3×[6.8+1.5],
=0.3×8.3,
=2.49
90.①20﹣
=20﹣(+
﹣
),
,
],
=20﹣1,
=19;
②9.07×99+9.07,
=9.07×(99+1),
=9.07×100,
=907;
小升初真题混合运算----
41