小升初四则混合运算题精选
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2021年01月24日 06:40
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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
(
+
)÷
+
10
÷
[
﹣(
÷
+
)
]
.
3
.(
2012?
武胜县)计算,能简算的要简算.
2004+75
×
54
÷
45
(×
8
﹣)×
4
32%
×
+
×
×
+
÷
(
﹣
)×(
+
)
1110
÷
[56
×(
﹣
)
]
4
.(
2012?
武胜县)计算.
(
108÷
25
)×(
75
÷
18
)
×(﹣÷)
(
﹣
)×(
+
)
×
[7
﹣
4
÷(
+
)
]
.
5
.(
2012?
万州区)计算:
9
﹣
= 780
÷
26=
×
3= 27
×
=
625
﹣
199= 10+=
0
÷
=
×
=
﹣
= =
1
÷
= 1
﹣
+
=
6
.(
2012?
桐庐县)计算.
①
92
×
13+28
②÷﹣
③
78
×
④
1
÷
﹣
÷
1
⑤
×
5
÷
×
5
⑥
2
﹣
÷
⑦
36
×(
+
)
7
.(
2012?
天柱县)脱式计算.
3060
÷
15
﹣
25
×
×
÷
+
(
+
)×(
÷
5
)
×
[
﹣(
﹣
)
]
.
8
.(
2012?
桃源县)脱式计算.
9
.
99
×
87+87
﹣﹣
5
×(
+
)÷
2
÷
[
(
﹣
)÷
]
.
10
.(
2012?
苏州)计算下面各题,能简算的要简算.
11
.①
630
÷
18
×
24
②
+++
③
16
×
+4
×
④(﹣×)÷
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
)(÷
16+
)÷
22
(
3
)
×
+
×
(
4
)
×
÷(
﹣
)
12
.(
2012?
硚口区)脱式计算.
(友情提醒:有的可以简< br>算)
13
.
800
﹣
608
÷
32
×
5
﹣×
+
48
×
+48
×
(
1
﹣
)÷×
4
(
6
﹣
6
×
)÷
12
.
14
.(
2012?
吉水县)脱式计算,能简算的要简算.
97
÷
1++0
×
6
1375+450
÷
15
×
25
[+
(
13
×
+13
×
)
]
÷
48
×
+48
×
+48
×
8
﹣(﹣)
×
+
×
+
×.
15
.(
201 2?
洪山区)
能简便的要用简便方法计算,
写出主
要过程
16
.(
1
)
360+240
÷
15
×
28
(
2
)
6
÷﹣×
(
3
)
×
6+6
×
(
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
)×
+
×
(
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
××
32
×
+
÷
40
÷
[
×(
+
)
]
17
.(
2011?
游仙区)用自己喜欢的方法算
18
.(
315+285
)÷(
315
﹣
255
)
5
﹣(
÷
+
)
(
+
﹣
)×
36
×
+
×
+75%
×
3
.
19
.(
2011?
永州)下面各题,怎样简便就怎样计算.
20
.
405
×(
20
﹣
172
÷
43
)
×
+
×
﹣﹣
÷
[
×(
﹣
)
]
.
21
.(
2011?
武昌区)递等式计算:
360
﹣
225
÷
15
×
18
÷
×
﹣﹣
+
÷
+
.
22
.(
2011?
田东县)计算下列各题.
23
.
860
﹣
560
÷
8
×
7
(
+
)÷
(
+
)×
20
÷
÷
[
(
+
)×
]
.
24
.(
2011?
瑞安市)
(
1
)
360+24
÷
15
×
30
(
2
)×
+
÷
(
3
)
×
29
﹣
8
×
(
4
)(
+
﹣
)÷
.
25.(
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)
26
.
109
×
x+109
×
x
﹣(
+
)÷
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
﹣﹣
(
3
)
(
4
)
(
5
)
(
6
)
38
÷
[
×(
+
)
]
.
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
×
+
×
.
25
.(
2011?
河西区)脱式计算.(能简算的要简算)
53
×
13+21
×
45+55
×
÷
[1
﹣(
+
)
]
.
26
.(
2011?
河池)用你喜欢的方法计算.
25
×
12
﹣
850
÷
17
×
99+25%
6
÷
7
﹣
(
)×
13+4
÷
17
.
27
.(
2011?
海州区)神机妙算:
2842
÷
14+74
×
3
÷(
﹣
)
×
99+
÷(
×
)
×
+
÷
72
×(
﹣
)
28
.(
2011?
丰都县)脱式计算
(
384+336
)÷
15
×
13
(
11+
)÷
16+
2
﹣
×
﹣
〔
1
﹣(
+
)〕÷
.
29
.(
2010?
自流井区)计算,能简便的要简便
(÷
+370
)×
18
÷
+
×
.
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
)
×
73
﹣×
2008
118
÷(
14+
×
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
÷
%+
×
.
34
.(
2012?
遂昌县)用递等式计算.
①
[1
﹣(
+
)
]
×
36
②(
+
)×
36
③×
+
×
④×
12
﹣÷
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
+
﹣
+
35
×(
1
﹣
)÷
.
36
.(
2012?
平坝县)用递等式计算,能简算的要简算.
÷
﹣
×
﹣﹣
(
+
)÷
+
.
37
.(
201 2?
陕西)
13
×
1
+
÷
.
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.
﹣
+=
9
×(﹣
)
=
﹣
=
12
×(
+
)
=
÷
2
÷
=
9
﹣
﹣
=
2
÷
﹣
÷
2=
×
99+=
××
32=
40.
(
2012?
金沙县)脱式计算,能简算的要简算
[25
﹣(
﹣
)×
12]
÷
5
×
+
×
99
×
101
×
32
×
×
+
×
67
﹣.
41.
(
2012?
建华区)计算下面各题.
657+360
÷
45
×
19
21
×
﹣(
+
)÷
(
)÷
.
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
﹣(
)
]
÷(
5+
×)
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
÷÷
8
×(
÷
)
+
÷
÷〔
1
﹣(
﹣
)〕
×
+
×
48.
(
2011?
沿滩区)计算.
8470
﹣
104
×
65
;
×(﹣)÷;
÷×
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
﹣
﹣
÷
+
×
[
﹣(
﹣
)
]
÷
.
54.
(< br>2011?
福州)计算下列各题.(能简算的写出简算过
程)
(
1
)×
+
÷
8+
,
(
2
)(
+++
)×,
55
.(
2011?
福安市)下面各题怎么简便怎么算.
×(
﹣
)÷
;
78< br>÷
[32
×(
1
﹣
)
+144]
;
×
﹣
×
;
××.
56
.(
2011?
东莞)选择你喜欢的方法进行计算:
×
27
﹣
÷(
1
﹣
)×
9
×
+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.
(
+
)÷
×(
+
)
+++
61
.(
2012?
康县)计算.(能简算的要简算)
﹣×(
)
÷
×
[1
﹣(
﹣
)
]
48
×
85
×
÷
23+
×
.
62
.
(
201 2?
姜堰市)计算下面各题,能简便计算的用简便
方法计算.
﹣÷×
[
﹣(
﹣
)
]
÷
×
+
×
×
99
﹣﹣
15
××.
63.
(
2012?
丰润区)用最喜欢的方法计算
×
38
×
(﹣
4
)×(÷)
×
+
×
÷
[
]
.
64.
(
2012?
东城区)脱式计算.
+32
×﹣
6
÷
[
(
+
)×
]
.
65
.(
2012?
城厢区)计算下面各题,能简算的要简算
①
96
×(
72
﹣)÷
②(
+
+
)×
12
③
×
36+36
×
④
[
﹣(
﹣
)
]
÷
.
66
.(
2011?
温江区)计算.
(
1
)﹣
+
﹣
(
2
)
3899+3737
÷
37
(
3
)
385
×
6
÷
385
×
6
(
4
)
(
5
)
(
6
)×
13+
×
26
.
67.
(
2011?
满洲里市)
计算下面各题,能简算的要简算.
﹣﹣
(×
73
)×
+
﹣
+
+
+
+
×
+
×﹣.
68.
(
2011?
建华区)计算下面各题.
﹣(
+
)÷
15
×
573+900
÷
36
×
15
(
)÷
+
.
69.
(
2011?
邗江区)脱式计算.
(
+
)×(﹣
2
.)
×(
32+64
)÷
÷
[
×(
﹣
)
]
×
[1
﹣(
﹣
)
]
.
70.
(
2010?
云龙县)用递等式计算.
①﹣
+
﹣
②
②
③(﹣)÷×
④÷(×)﹣
1
.
④
÷(
×
)﹣
1
.
71.
(< br>2010?
徐闻县)计算下列各题,能简算的要简算
(
1
)(
)×
36
(
2
)﹣(
+
)
+
(
3
)
(
4
)
25
××
32
(
5< br>)(
5
﹣)÷(
2
×﹣
3
)
< br>(
6
)
27
÷
7+43
×(
1
﹣< br>)
72.
(
2010?
霞浦县)怎样算简便就怎样算.
×
16
﹣
4560
÷
15
××
32
×
.
73.
(
2010?
双阳区)
(
1
)÷﹣
16
×
(
2
)
÷
[
×(
﹣
)
(
3
)÷
(
4
)﹣﹣
+
(
5
)×
+38
×
(
6
)×
9
﹣.
74.
(
2010?
曲周县)选择你喜欢的方法计算.
﹣
+
﹣
×
+
÷
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
)(×
8
﹣)×
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
)﹣
+
﹣
(
2
)
375+450
÷
18
×
25
(
3
)×
+
×
(
4
)
÷(
﹣
)
77.
(
2010?
龙海市)选择合适的方法,计算下面各题.
﹣﹣
920
÷
40
﹢
23
×
50
12
×(
+
﹣
)
×
+
÷
1
+
×
2
78.
(
2010?
乐清市)
(
1
)×
+
;
(
2
)
16
﹣
+
﹣
;
(
3
)××;
(
4
)÷(
9
﹣×);
(
5
)
59+59
×
13+14
×
41
.
79
.(
2009?
重庆)脱式计算.
﹣
40
÷
8
×
×
+
÷
+[
(
﹣×
700
)÷
]
[2
﹣(
﹣)÷
]
×
.
80.
(
2009?
宜昌)用自己喜欢的方法计算.
205
﹣
105
×
12
÷
45
×(﹣)÷
(
+
)÷
(
+
)÷
50%
884
÷
34+17
×
21
×(﹣
)
+
.
81
.(
2009?
淇滨区)计算:
+
×
99
﹣
+
﹣
×
67+33
×
.
82
.(
2009?
成都)
1
÷
+
×
+1
.
83.
(
2008?
资中县)用递等式计算(能简算的请简算)
①﹣
+
﹣
②
4
×××
③
×
+
÷
④
1375
﹣
375
÷
15
×
18
⑤×(﹣)÷
⑥
×〔(
﹣
)÷
〕
84
.(
2008?
武进区)用递等式计算:
①﹣×÷;
②
5
÷
﹣
×
;
③÷(
5+
×);
④
÷(
+
)×
;
⑤
3
÷
×(
﹣
).
85
.(< br>2008?
汕头)混合运算.(能简便的要写简便过程)
①×﹣×﹣
②
38
﹣
+
﹣
③
④
.
86
.(
2008?
邗江区)用递等式计算,能简算的要简算
(
1
)
18
﹣÷(﹣)
(
2
)
(
3
)
2
﹣
(
4
)÷
+
×
5
(
5
)
[
﹣(
+
)
]
÷
(
6
)
÷
[56
×(
)
].
87
.(
2008?
广西)灵活计算下面各题
(
1
)﹣﹣
(
3
)×
32
(
2
)÷(×
2
﹣)
(
4
)
×
[1
﹣(
﹣
)
] 88
.
(
2008?
大足县)脱式计算(其中④、⑤两小题必须简
算).
①
730
﹣
240
÷
15
×
16
②
[
﹣(﹣)
]
×
③
÷
[
(
+
)×
]
④
+++
⑤
×
17
÷
9+3
÷
8
×
.
89.
(
2007?
浦东新区)
(
1
)﹣﹣
(
2
)
+
÷×
(
3
)(
+
)×
(
4
)×
+
×
(
5
)
2
÷(﹣×)
(
6
)×
[
(﹣
10
)÷
+]
.
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×
99+
③
+
×
÷
2
④
+
÷(
22
﹣)
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
÷
+
,
=5+
,
=
;
(
3
)
÷(
﹣
)×(
+
),
=
÷
×
,
=
×(
×
),
=
×
,
=
;
(
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
)(×
8
﹣)×
4
,
=
(
1
﹣)×
4
,
=
×
4
,
=2
;
(
3
)
32%
×
+
×,
=32%
×
+
×
=
×(
+
),
=
×
90
,
=
;
(
4
)
×
+
÷
,
=
+
,
=
;
(
5
)(
﹣
)×(
+
),
=
×
,
=
;
(
6
)
1110
÷
[56
×(
﹣
)
]
,
=1110
÷
[56
×
﹣
56
×
]
,
=1110
÷
[24
﹣
21]
,
=1110
÷
3
,
=370
4
.(< br>1
)(
108
÷
25
)×(
75
÷
18
),
=
×
,
=18
;
(
2
)×(﹣÷),
=
×(﹣),
=
×,
=
;
(
3
)(
﹣
)×(
+
),
=
×
,
=
;
(
4
)
×
[7
﹣
4
÷(
+
)
]
,
=
×
[7
﹣
4
÷
]
,
=
×
[7
﹣
4
×
]
,
=
×
[7
﹣
5]
,
=
×
2
,
=
.
5
.
9
﹣
=
,
780
÷
26=30
,
×
3=
,
27
×
=15
,
625
﹣
199=426
,
10+=
,
0
÷
=0
,
×
=
,
﹣
=
,
=
,
1
÷
=
,
1
﹣
+
=
;
6
.①
92
×
13+28
=1196+28
,
=1224
;
②÷﹣
=
﹣,
=
;
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
×
=204
﹣
26
,
=178
;
(
2
)
×
÷
+
=
×
+
,
=
+
,
=
;
(
3
)(
+
)×(
÷
5
)
=
×
×
,
=
;
(
4
)
×
[
﹣(
﹣
)
]
.
=
×
[
+
﹣
]
,
=
×
,
=
.
8
.(
1
)
99
×
87+87
,
=
(
99+1
)×
87
,
=100
×
87
,
=8700
;
(
2
)﹣﹣,
=
﹣(
+
),
=
﹣
10
,
=
;
(
3
)
5
×(
+
)÷
2
,
=5
×
÷
2
,
=6
÷
2
,
=3
;
(
4
)
÷
[
(
﹣
)÷
]
,
=
÷
[
÷
]
,
=
÷
,
=
.
9
.①
630
÷
18
×
24
,
=35
×
24
,
=840
;
②
+++
,
=
(
+
)
+
(
+
),
=5+10
,
=15
;
③
16
×
+4
×
,
=
(
16+4
)×
,
=20
×
,
=8
;
④(﹣×)÷
4
,
=
(﹣)÷
4
,
=3
÷
4
,
=
;
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
)(÷
16+
)÷
22
,
=
(
+
)÷
22
,
=11
÷
22
,
=
;
(
3
)
×
+
×
,
=
(
+
)×
,
=1
×
,
=
;
(
4
)
×
÷(
﹣
),
=
×
÷
,
=
×
×
12
,
=
×
12
×
,
=3
×
,
=
.
12
.(1
)
800
﹣
608
÷
32
×
5,
=800
﹣
19
×
5
,
=800
﹣
95
,
=705
;
(
2
)﹣×
+
,
=
﹣
+
,
=+
,
=
;
(
3
)
48
×
+48
×,
=48
×(
+
),
=48
×
10
,
=480
;
(
4
)(
1
﹣
)÷×
4
,
=
÷×
4
,
=1
×
4
,
=4
;
(
5
)(
6
﹣
6
×
)÷
12
,
=
(
6
﹣
4
)÷
12
,
=2
÷
12
,
=
.
13.(
1
)
97
÷
1++0
×
6
=97++0
,
=
;
(
2
)
1375+450
÷
15
×
25
=1375+30
×
25
,
=1375
﹣
750
,
=625
;
< br>(
3
)
[+
(
13
×
+13
×)
]
÷
=[+
(
13
×
×
2
)
]
÷
,
=[+]
÷
,
=
×
,
=
;
(
4
)
48
×
+48
×
+48
×
8
=
(
+
+8
)×
48
,
=9
×
48
,
=432
;
(
5
)﹣(﹣)
=
﹣
+
,
=0+
,
=
;
(
6
)×
+
×
+
×
=
(
+
)×
+
×,
=
×
+
×,
=
(
+
)×,
=100
×,
=918
14
.(
1
)
360+240
÷
15
×
28
,
=360+16
×
28
,
=360+448
,
=808
;
(
2
)
6
÷﹣×,
=
﹣,
=
;
(
3
)
×
6+6
×
,
=
(
+
)×
6
,
=1
×
6
,
=6
;
(
4
)(
﹣)÷
×
,
=
÷
×
,
=
×
,
=
15
.(
1
)
43
×
8﹣
420
÷
15
,
=344
﹣
28
,
=316
;
(
2
)
+2
+
+3
,
=
(
+
)
+
(
3
+2
),
=1+6
,
=7
;
(
3
)
×
÷
15
,
=
×
,
=
;
(
4
)(
+
)÷
﹣
,
=
×
﹣
,
=
﹣
,
=
;
(
5
)×
+
×
=
×(
+
),
=
×
10
,
=39
;
(
6
)
+
(
﹣
)×
,
=
+
×
,
=
+
,
=
.
16
.(
1
)
420
÷< br>216
÷
18
×
17
,
=
÷
18< br>×
17
,
=
×
17
,
=
;
(
2
)
25
××
32
,
=25
××
8
×
4
,
=
(
25
×
4
)×(×
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
)×
+
×
+75%
×
3
,
=
(
++3
)×,
=10
×,
=
18
.①
405
×(
20
﹣
172< br>÷
43
),
=405
×
16
,
=6480
;
②
×
+
×
,
=
×(
+
),
=
;
③﹣﹣,
=
﹣(
+
),
=
﹣
10
,
=
.
④
÷
[
×(
﹣
)
]
,
=
÷
[
×
]
,
=
×
,
=3
19
.(
1
)< br>360
﹣
225
÷
15
×
18
,
=360
﹣
15
×
18
,
=360
﹣
270
,
=90
;
(
2
)
÷
×
,
=
×
,
=
;
(
3
)﹣﹣,
=
﹣(
+
),
=
﹣
4
,
=
;
(
4
)
+
÷
+
,
=
+
+
,
=
+
+
,
=1+
,
=1
.
20
.
860
﹣
560
÷
8
×
7
=860
﹣
70
×
7
,
=860
﹣
490
,
=370
;
(
+
)÷
=
÷,
=
(
+
)×
20
÷
=
(
×
20+
×
20
)
,
=
(
15+16
)×
,
=31
×
,
=21
;
÷
[
(
+
)×
]
.
=
÷
[
×
]
,
=
,
=
.
21
.(
1
)
360+24
÷
15
×
30
,
=360+
×
30
,< br>
=360+48
,
=408
;
(
2
)×
+
÷,
=+
,
=
;
(
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
)﹣(
+
)÷,
=
﹣÷,
=
﹣,
=
;
(
3
)
,
=
÷
+
,
=
+
,
=
.
23
.(
1
)
3600
﹣
800
÷
40
×35
,
=3600
﹣
20
×
35
,
=3600
﹣
700
,
=2900
;
(
2
)
64
﹣﹣,
=64
﹣(
+
),
=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
÷
[
×(
+
)
]
,
=38
÷
[
×
8]
,
=38
÷
20
,
=
24
.(
1
)
6760
÷
13+17
×
21
,
=520+357
,
=877
;
(
2
)×
+
×
=
(
+
)×,
=10
×,
=45
;
(
3
)(
+
)÷(
﹣
)
=
,
=
;
(
4
)
=12
÷
[
×
]
,
=12
÷
,
=48
.
25
. (
1
)
53
×
13+21
,
=689+21
,
=710
;
(
2
)×
45+55
×,
=
×(
45+55
),
=
×
100
,
=165
;
(
3
)
÷
[1
﹣(
+
)
]
,
=
÷
[1
﹣
]
,
=
,
=
.
26
.(
1
)
25
×
12
﹣
850
÷
17
,
=300
﹣
50
,
=250
;
(
2
)×
99+25%
,
=
×(
99+1
),
=
×
100
,
=25
;
(
3
)
6
÷
7
﹣
,
=
﹣
,
=
;
(
4
) (
)×
13+4
÷
17
,
=
×
13+×
13+4
÷
17
,
=
+
+
,
=
+
(
+
),
=
+1
,
=2
.
27
.(< br>1
)
2842
÷
14+74
×
3
=28 48
÷
7
÷
2+74
×
3
,
=203+222
,
=425
;
(
2
)
÷(
﹣
)
=
×
12
,
=10
;
(
3
)×
99+
=
(
99+1
)×,
=100
×,
=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+
)÷
16+
,
=
÷
16+
,
=+
,
=
;
(
3
)
2
﹣
×
﹣
,
=2
﹣
﹣
,
=2
﹣(
+
),
=2
﹣
1
,
=2
;
(
4
)
[1
﹣(
+
)
]
÷
,
=[1
﹣
]
÷
,
=
÷
,
=
.
29
.(
1
)(÷
+370
)×
18
,
=
(
460+370
)×
18
,
=830
×
18
,
=14940
;
(
2
)÷
+
×
,
=
×
+
×
,
=
(
+
)×
,
=9
×
,
=12
;
(
3
)
,
=
﹣
﹣﹣
,
=
(﹣)﹣(
+
),
=7
﹣
,
=6
;
(
4
)×(
+
+
+
),
=
×(
×
4
),
=
(×
4
)×
,
=10
×
,
=
.
30
.(< br>1
)
3618
÷
45+1620
,
=+1620
,
=
;
(
2
)
67
﹣
67
×(
23+19
),
=67
×(
1
﹣
23
﹣
19
),
=67
×(﹣
41
),
=
﹣
2747
;
(
3
)×
73
﹣×
2008
,
=2008
×﹣×
2008
,
=
(﹣)×
2008
,
=1
×
2008
,
=2008
;
(
4
)
118
÷(
14+
×
45
),
=118
÷(
14+
),
=118
÷,
=
;
(
5
)< br>99
﹣
97+95
﹣
93+91
﹣
89+
…
+7
﹣
5+3
﹣
1
,
=2+2+
…
2+2
,
=2
×
25
,