小升初真题四则混合运算题
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2021年01月24日 06:44
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大学英语2课后答案-青春年少
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:
①
428
÷
[32
÷(
4+4
)
] ②
127
×
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
×
+
÷
(
﹣
)×(
+
)
1110
÷
[56
×(
﹣
)
]
4
.(
2012
武胜县)计算.
(
108
÷
25
)×(
75
÷
18
)
3.5< br>×(
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.
①
92
×
13+28
②
4.2
÷
1.5
﹣
0.36
③
78
×
④
1
÷
﹣
÷
1
⑤
×
5
÷
×
5
⑥
2
﹣
÷
⑦
36
×(
+
)
7
.(
2012
天柱县)脱式计算.
3060
÷
15
﹣
25
×
1.04
×
÷
+
(
+
)×(
÷
5
)
×
[
﹣(
﹣
)
]
.
8
.(
2012
桃源县)脱式计算.
99
×
87+87
18.7
﹣
3.375
﹣
6.625
5
×(
+0.5
)÷
2
÷
[
(
﹣
)÷
]
.
9
.(
2012
苏州)计算下面各题,能简算的要简算.
①
630
÷< br>18
×
24
②
0.7+3.9+4.3+6.1
③
16
×
+4
×
④(
7.5
﹣
7.5
×
0.6
)÷
4
⑤(
+
÷
3
)×
⑥.
10
.(
2012
顺昌县)脱式计算.(能简算的要 简算)
①
14
×
75
﹣
624
÷
39
②
÷
9+
×
③
+
(
﹣
)÷
④
÷
[
﹣(
1
﹣
)
]
.
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)< br>
800
﹣
608
÷
32
×
5
3.68
﹣
3.6
×
0.2+0.18
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+
(< br>13
×
+13
×
)
]
÷
48
×
+48
×
+48
×
8
94.47
﹣(
94.47
﹣
86.555
)
3.42
×
76.3+76.3
×
5.76+9.18< br>×
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
×< br>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
(
3
)
×
÷
15
(
4
)
(
+
)÷
﹣
(
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< br>×
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
)
×
+
×
17.31
﹣
6.15
﹣
3.85
÷
[
×(
﹣
)
]
.
19
.(
2011
武昌区)递等式计算:
360
﹣
225
÷
15
×
18
÷
×
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
(
3
)
×
29
﹣
8
×
(
4
)
(
+
﹣
)÷
.
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
)
(
6
)
38
÷
[2.5
×(
4.36+3.64
)
]
.
24< br>.
(
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
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
.
27
.(
2011
海州区)神机妙算:
2842
÷
14+74
×
3
÷(
﹣
)
3.6
×
99+3.6
÷(
×
)
×
+
÷
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
2008
÷
31
.(
2012
咸安区)灵活计算
①
②
③
④
.
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.
①
520+2613
÷
13
②
×
5
×
③(
+
)÷
+
④(
+
﹣
)÷
⑤
÷
62.5%+
×
.
34
.(
2012
遂昌县)用递等式计算.
①
[1
﹣(
+
)
]
×
36
②(
+
)×
36
③
7.5
×
4.7+4.7
×
2.5
④
25.3
×
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
35
×(
1
﹣
)÷
.
36
.< br>(
2012
平坝县)
用递等式计算,能简算的要简算.
÷
﹣
×
13.54
﹣
6.88
﹣
3.12
(
+
)÷
+
.
37
.(
201 2
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
÷
=
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
﹣(
+
)÷
45.
(
2012
海港区)脱式计算
(
+
)÷
+
9
÷
[1
﹣(
)
]
1.02
÷(
5+0.4
×
0.25
)
46.
(
2012
福州)用递等式计算,能简算的要简算
﹣
+
﹣
=
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
﹣(
﹣
)
〕
×
+
×
48.
(
2011
沿滩区)计算.
8470
﹣
104
×
65
;
0.6
×(
5.3
﹣
1.7
)÷
0.9
;
5.2
÷
0.8
×
6+42
;
÷(
﹣
)×
;
[
﹣(
﹣
)
]
÷
.
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
)
×
﹣
×
.
51.
(
2011
龙湾区)用递等式计算,能简便的要用简便
方法计算.
÷
×
5
÷
9+
×
5
×(
﹣
)÷
48
×(
+
﹣
)
52
.(
2011
嘉禾县)用递等式计算下面各题:
(
15
﹣
14
×
)×
21
×(
)
53.
(
2011
滑县)怎样简便就怎样算
+
×
3
5
﹣
﹣
0.125
÷
+
×
[
﹣(
﹣
)
]
÷
.
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+
,< br>
(
2
)
(
2.3+2.3+2.3+2.3
)×< br>2.5
,
55
.(
2011
福安市)下面各题怎么简便怎么算.
×(
﹣
)÷
;
78
÷
[32
× (
1
﹣
)
+144]
;
×
﹣
×
;
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
×
(
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
)
(
3
)
(
15
﹣
14
×
)×
×
+
×
(
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
﹣(
﹣
)
]
48
×
85
×
÷
23+
×
.
62< br>.
(
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< br>﹣
4
)×(
0.32
÷
1.6
)
6.5
×
4.6+6.5
×
15.4
÷
[
]
.
64.
(
2012
东城区)脱式计算.
0.6+32
×
0.25
﹣
6
÷
[
(
+
)×
]
.
65
.(
2012
城厢区)计算下面各题,能简算的要简算
①
96
×(
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
)
(
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
.< br>
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.
①
3.6
﹣
2.8+6.4
﹣
7.2
②
③(
6.9
﹣
3.15
)÷
0.3< br>×
0.8
④
÷(
×
)﹣
1
.
71.
(< br>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
×
.
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
﹣
1.2 5
.
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
×
+13.7
÷
15
÷(
+
)×
×
17+
×
23
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
÷
[
+
(
﹣
)
]
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
﹣
+
﹣
;
(
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.
30.5
﹣
40
÷
8
×
2.4
1.6
×
+
÷
2.4
8.5+[
(
﹣< br>0.005
×
700
)÷
]
[2
﹣(
﹣
1.5
)÷
]
×
.
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%
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< br>成都)
1
÷
2.5+2.5
×
0.4+1
.
83.
(
2008
资中县)用递等式计算(能简算的请简算)
①
7.6
﹣
4.8+8.4
﹣
5.2
②
4
×
0.8
×
2.5
×
1.25
③
×
+
÷
④
1375
﹣
375
÷
15
×
18
⑤
1.05
×(
3.8
﹣
0.8
)÷< br>6.3
⑥
×〔
(
﹣
)÷
〕
84
.(
2008
武进区)用递等式计算:
①
0 .6
﹣
0.2
×
1.9
÷
7.6
;
②
5
÷
﹣
×
;
③
1.02÷(
5+0.4
×
0.25
);
④
÷(
+
)×
;
⑤
3
÷
×(
﹣
).
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
②
38
﹣
15.4+0.125
﹣
4.6
③
④
.
86
.(
2008
邗江区)用递等式计算,能简算的要简算
(
1
)
18
﹣
10.4
÷(
6.2
﹣< br>4.9
)
(
2
)
(
3
)
2
﹣
(
4
)
3.6
÷
0.4+1.3
×
5 < br>(
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< br>简算).
①
730
﹣
240
÷
15
×
16
②
[2.06
﹣(
1.73
﹣
0.29
)
]×
1.5
③
÷
[
(
+
)×
]
④
6.8+2.37+7.63+4.2
⑤
×
17
÷9+3
÷
8
×
.
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
×
[< br>(
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).
①
20
﹣
﹣
②
9.07
×
99+9.07
③
+
×
÷
2
④
2.3+3.91
÷(< br>22
﹣
19.7
)
⑤
×
[
﹣(
﹣
)
]
.
参考答案:
1
.①
428
÷
[32
÷(
4+4
)
]
,
=428
÷
[32
÷
8]
,
=428
÷
4
,
=107
;
②
127
×
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
)
÷(
﹣
)×(
+
),
=
÷
×< br>,
=
×(
×
),
=
×
,
=
;
(
4
)
3
÷
÷
÷
4
,
=9
×
÷
4
,
=12
÷
4
,
=3
;
(
5
)
(
+
)÷
+
,
=
×
,
=
+
,
=
;
(
6
)
10
÷
[
﹣(
÷
+
)
]
,
=10
÷
[
﹣(
+
)
]
,
=10
÷
[
﹣
]
,
=10
÷
,
=81
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
;
(< br>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
×(
﹣
)
]
,
=1110
÷
[56
×
﹣
56
×
]
,
=1110
÷
[24
﹣
21]
,
=1110
÷
3
,
=370
4
.(< br>1
)
(
108
÷
25
)×(
75
÷
18
),
=
×
,
=18
;
< br>(
2
)
3.5
×(
20.6
﹣
16.8÷
4.8
),
=3.5
×(
20.6
﹣
3.5
),
=3.5
×
17.1
,
=59.85
;
(
3
)
(
﹣
)×(
+
),
=
×
,
=
;
(
4
)
×
[7
﹣
4
÷(
+
)
]
,
=
×
[7
﹣
4
÷
]
,
=
×
[7
﹣
4
×
]
,
=
×
[7
﹣
5]
,
=
×
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
2
=0.16
,
1
÷
=
,
1
﹣
+
=
;
6
.①
92
×
13+28
=1196+28
,
=1224
;
②
4.2
÷
1.5
﹣
0.36
=2.8
﹣
0.36
,
=2.44
;
③
78
×
=
(
79
﹣
1
)×
,
=79
×
﹣
1
×
,
=3
﹣
,
=2
;
④
1
÷
﹣
÷
1
=4
﹣
,
=3
;
⑤
×
5
÷
×
5
=
×
5
×
5
,
=1
×
5
×
5
,
=25
;
⑥
2
﹣
÷
=2
﹣
,
=
;
⑦
36
×(
+
)
=36
×
+36
×
,
=6+24
,
=30
.
7
.(
1
)
3060
÷
15
﹣
25
×
1.04
=204
﹣
26
,
=178
;
(
2
)
×
÷
+
=
×
+
,
=
+
,
=
;
(
3
)
(
+
)×(
÷
5
)
=
×
×
,
=
;
(
4
)
×
[
﹣(
﹣
)
]
.
=
×
[
+
﹣
]
,
=
×
,
=
.
8
.(
1
)
99
×
87+87
,
=
(
99+1
)×
87
,
=100
×
87
,
=8700
;
(
2
)
18.7
﹣
3.375
﹣
6.625< br>,
=18.7
﹣(
3.375+6.625
),
=18.7
﹣
10
,
=8.7
;
(
3
)
5
×(
+0.5
)÷
2
,
=5
×
÷
2
,
=6
÷
2
,
=3
;
(
4
)
÷
[
(
﹣
)÷
]
,
=
÷
[
÷
]
,
=
÷
,
=
.
9
.①
630
÷
18
×
24
,
=35
×
24
,
=840
;
②
0.7+3.9+4.3+6.1
,
=
(
0. 7+4.3
)
+
(
6.1+3.9
),
=5+10
,
=15
;
③
16
×
+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
.①
14
×
75
﹣
624
÷
39
=1050
﹣
16
,
=1034
;
②
÷
9+
×
=
×
+
×
,
=
(
+
)×
,
=
×
,
=
;
③
+
(
﹣
)÷
=
+
×
,
=
+
,
=
;
④
÷
[
﹣(
1
﹣
)
]
.
=
÷
[
﹣
]
,
=
,
=
.
11
.(
1
)
1379+450< br>÷
18
×
40
,
=1379+25
×
40< br>,
=1379+1000
,
=2379
;
(
2
)
(
3.2
÷
16+10.8
)÷
22
,
=
(
0.2+10. 8
)÷
22
,
=11
÷
22
,
=0.5
;
(
3
)
×
+
×
,
=
(
+
)×
,
=1
×
,
=
;
(
4
)
×
÷(
﹣
),
=
×
÷
,
=
×
×
12
,
=
×
12
×
,
=3
×
,
=
.
12
.(1
)
800
﹣
608
÷
32
×
5,
=800
﹣
19
×
5
,
=800
﹣
95
,
=705
;
(
2
)
3.68
﹣
3.6
×
0.2+0.18< br>,
=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
,< br>
=
(
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
;
< br>(
3
)
[4.5+
(
13
×
+13
×
)
]
÷
=[4.5+
(
13
×
×
2
)
]
÷
,
=[4.5+9.75]
÷
,
=14.25
×
,
=8.55
;
(< br>4
)
48
×
+48
×
+48
×
8
=
(
+
+8
)×
48
,
=9
×
48
,
=432
;
(
5
)
94.47
﹣(
94.47
﹣
86.555< br>)
=94.47
﹣
94.47+86.555
,
=0+86.555
,
=86.555
;
(< br>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
,
=
(
+
)
+
(
3
+2
),
=1+6
,
=7
;
(
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
÷< br>216
÷
18
×
17
,
=
÷
18< br>×
17
,
=
×
17
,
=
;
(
2
)
25
×
12.5< br>×
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%< br>×
3
,
=
(
3.3+3.7+3
)×
0.75
,
=10
×
0.75
,
=7.5
18
. ①
405
×(
20
﹣
172
÷
43
),< br>
=405
×
16
,
=6480
;
②
×
+
×
,
=
×(
+
),
=
;
③
17.31
﹣
6.15
﹣
3.85
,
=17.31
﹣(
6.15+3.85
),
=17.31
﹣
10
,
=7.31
.
④
÷
[
×(
﹣
)
]
,
=
÷
[
×
]
,
=
×
,
=3
19
.(
1
)< br>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
,< br>
=360+48
,
=408
;
(2
)
0.25
×
7.2+2.8
÷
0.5
,< br>
=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
;
(
2
)
64
﹣
15.8
﹣
14.2
,
=64
﹣(
15.8+14.2
),
=64
﹣
30
,
=34
;
(
3
)
,
=
(
40
﹣
27
)×,
=13
×
,
=9
;
(
4
)
,
=
×
36
﹣
×
36+
×
36
,
=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
.(< br>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
÷
[
×
]
,
=12
÷
,
=48
.
25
. (
1
)
53
×
13+21
,
=689+21
,
=710
;
(
2< br>)
1.65
×
45+55
×
1.65
,
=1.65
×(
45+55
),
=1.65
×
100
,
=165
;
< br>(
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
)
(
)×
13+4
÷
17
,
=
×
13+
×
13+4
÷
17
,
=
+
+
,
=
+
(
+
),
=
+1
,
=2
.
27
.(< br>1
)
2842
÷
14+74
×
3
=284 8
÷
7
÷
2+74
×
3
,
=203+222
,
=425
;
(
2
)
÷(
﹣
)
=
×
12
,
=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
,< br>
=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< br>,
=
(
460+370
)×
18
,
=830
×
18
,
=14940
;
< br>(
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
.(< br>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
,< br>
=
(
7.3
﹣
6.3
)×
2008
,
=1
×
2008
,
=2008
;
(
4
)
118
÷(
14+2.5
×
45
),
=118
÷(
14+112.5
),
=118
÷
126.5
,
=
;
(
5
)
99
﹣
97+95
﹣
93+91
﹣
89+
…
+7
﹣
5+3
﹣
1
,
=2+2+
…
2+2
,
=2
×
25
,