初一计算题简单专项练习题
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初一计算题简单
一.解答题(共
49
小题)
1
.
1+
( ﹣
2
)
+|
﹣
2
﹣
3|
﹣
5.
2
.
(
1
)
6+
(﹣
5
)﹣
2
﹣(﹣
3
)
(
2
)1+
(﹣
)﹣(﹣
)﹣
(
3
)
(﹣
)
+
(﹣
)
+
(
+1
)
(
4
)﹣
(
5
)
5.4﹣
2.3+1.5
﹣
4.2
(
6
)﹣
2
﹣
6
﹣
|
﹣
9+5|
3
.计算
①
(﹣
12
)﹣
5+
(﹣
14
)﹣(﹣
39
)
②
|
﹣
21.76|
﹣
7.26+
(﹣
3
)
;
③
3
+
(﹣
)﹣(﹣
)
+2
④
0
﹣
16+
(﹣
29
)﹣(﹣
7
)﹣(< br>+11
)
4
.计算:
(
1
)﹣
2
﹣
1
;
(
2
)﹣
|
﹣
7
|+
(
+3
)﹣
5
;
(
3
)
2.7+
(﹣
8.5
)﹣(
+3.4
)﹣(﹣
1.2
)
;
(
4
)﹣
3
﹣
2+
(﹣
4
)﹣(﹣
1
)
;
(
5
)
(﹣
1.2+2
)﹣(﹣
5
)﹣
|
﹣
3.4
﹣(﹣
1.2
)
|
;
(
6
)﹣
205+400
+
(﹣
204
)
+
(﹣
1
)
.
5.
(﹣
)
+3
+|
﹣
0.75|+
(﹣
5
)
+|
﹣
2
|
6
.计算:
7
﹣(﹣
3
)
+
(﹣
5
)﹣
|
﹣
8|
.
7
.计算:﹣
|
﹣
1|+|﹣
|+
(﹣
2
)
.
8
.计算下列各题:
第
1
页(共
19
页)
(< br>1
)﹣
13
﹣
7+20
﹣
40+16
(
2
)﹣
﹣
|
﹣
|+
﹣(
+
)﹣(﹣
)
9
.计算题:
①
|
﹣
|
﹣
②
|
﹣
5.3|
﹣
|3|
③
( ﹣
0.8
)
+
(﹣
0.4
)
+0.5+
( ﹣
0.3
)
+1.5
10
.
|
﹣
21.76|
﹣
7.26+
﹣
3
.
11
.
(﹣
4
)﹣
|
﹣
8|+|
﹣
2|﹣(﹣
3
)
.
12
.
13
.计算下列各题
(
1
)(﹣
34
)
+
(
+8
)﹣(﹣
5
)< br>+
(﹣
23
)
(
2
)
4.2+< br>(﹣
2
)﹣(﹣
3.8
)
+12
(
3
)﹣
2
+[
﹣(﹣
2
)
]
﹣
|
﹣
|+
(
+1
)
(
4
)|
﹣
1|+|
﹣
|+|
﹣
+
…
+|< br>14
.
15
.
|
﹣
|+
﹣
.
﹣(﹣
3
)
﹣
|
﹣
5|
.
.
﹣
|
.
1 6
.
|5
﹣
7|
﹣
|
(﹣
5
)﹣
7|+
17
.
(﹣
1
)﹣(
+6
)﹣2.25+
18
.
19
.计算:
(
1
)﹣
8+4
﹣(﹣
2
)
(
2
)
(
3
)﹣
5.6+0.9
﹣
4.4+8.1
﹣
0.1
(
4
)
20
.计算
第
2
页(共
19
页)
< br>(
1
)﹣
20
﹣(﹣
18
)
+
(﹣
14
)
+13
(
2
)
18+
( ﹣
12
)
+
(﹣
21
)﹣(﹣
12
)
(
3
)
﹣
|
﹣
1
|
﹣(< br>+2
)﹣(﹣
2.75
)
(
4
)
0.35+
(﹣
0.6
)
+0.25
﹣(
+5.4
)
(
5
)
1
(
6
)
(
+1.125
)﹣(
+3
)﹣(
+
)
+
(﹣
0.25
)
21
.计算:
(﹣
0.5
)
+|0
﹣
6
|
﹣(﹣
7
)﹣(﹣
4. 75
)
.
22
.计算
(
1
)
(﹣
3.6
)
+
(
+2.5
)
;
(
2
)
(﹣
49
)﹣(﹣
9 1
)﹣(
+51
)
+
(﹣
9
)
;
(
3
)
3
﹣(﹣
)
+2
+
(﹣< br>)
;
(
4
)
1+
(﹣
2
)
+|﹣
2
﹣
3|
﹣
5
.
23
.计算下列各式:
(
1
)
(﹣
3< br>)
+
(
+15.5
)
+
(﹣
16
)
+
(﹣
5
)
;
(
2
)
13
﹣(﹣
)
+
;
(
3
)
(
17
)﹣(
+6.25
)﹣(﹣8
)﹣(
+0.75
)﹣
22
;
(
4
)
0.125+
(﹣
8
)﹣(﹣
)﹣
2
;
(
5
)
(﹣
2
)﹣(﹣
4.7
)
+
(﹣
0.5
)
+|
﹣
2.4|
﹣(
+3.2
)
.
24
.计算:
(
1
)
|
﹣
|+|
﹣
|+|
)﹣
5+﹣
|
]+|
﹣
3|
(
2
)
2
﹣
[
﹣
1
﹣(﹣
(
3
)﹣< br>5
+3
﹣
9
+16
(
4
)﹣
5
+
(﹣
9
)
+3
+17
.
25
.
(
1
)
(﹣
14
)
+
(﹣
6
)
第
3
页(共
19
页)
(< br>2
)
(﹣
6
)
+
(
+4
)
(
3
)
+
(﹣
)
+
(
+1
)
(
4
)
(﹣
25
)﹣(﹣
18
)﹣(
+5
)
+
(
+12
)
(
5
)
2.4+
(﹣
3.5
)
+
(
+5
)
+
(﹣
4
)
(
6
)
(
|
﹣
8|
﹣
16
)﹣
[
(﹣
16
)﹣(﹣
8
)
]
.
26
.计算:
(
1
)
25.7+
(﹣< br>7.3
)
+
(﹣
13.7
)
+7.3
;
(
2
)
(﹣
7
)﹣
4+
(﹣
3
)﹣(﹣
4
)
+|
﹣
10|
.
27
.计算:
(
1
)
23+
(﹣
72
)
+
(﹣
22
)
+57+
(﹣
16
)
;
(
2
)﹣
3
﹣(﹣
2﹣
5
)﹣
28
.计算下列各题
(
1
)
|
﹣
3|+|
﹣
10|
﹣
|
﹣
5|
(
2
)
2
﹣(
5
﹣
7
)
(
3
)﹣
11
﹣
7+
(﹣
9
)﹣ (﹣
6
)
(
4
)
(﹣
3.5
)
+
(
+8
)﹣(﹣
5.5
)
+
(﹣
2
)
.
29
.计算
(
1
)﹣
8
﹣
12+2
(
2
)﹣
18+
(﹣
7.5
)﹣(﹣
31
)﹣
12.5
(
3
)﹣
﹣ (
+1
)﹣(﹣
)﹣(
+4
)
(
4
)
1
﹣
[
(﹣
1
)﹣(
)﹣(
+5
)﹣(
)
]+|
﹣
4|
.
30
.化简
①
﹣
|
﹣(
+7
)
|
=
;
②
﹣
|
﹣
8|
=
;
③
|
﹣
|+
||
=
;
④
﹣
|
π
﹣
3.14|
=
;
⑤
|
﹣
6 .5|
﹣
|
﹣
5.5|
=
;
第
4
页(共
19
页)
+
(﹣
2
)
.
⑥
﹣
|
﹣
a
|
=
(
a
<
0
)
31
.
|
﹣
2
|
﹣(﹣
)
+1
﹣
|1
﹣
|
32
.﹣
5.3
﹣
3.2+2.5
﹣
|
﹣
5.7|
33
.计算
(
1
)
(
2
)
12
﹣(﹣
18
)
+
(﹣
7
)﹣
15
(
3
)已知
|
a
|
=
3
,
|
b
|
=
5
,且
a
>
b
,求
a
﹣
b
的值.
34
.计算:
(
1
)
(﹣< br>16
)
+12
﹣
24
﹣(﹣
18
)
(
2
)﹣
+2+
(﹣
)﹣
|
﹣
5 |
35
.计算:
(
1
)
(﹣
52
)
+
(﹣
19
)﹣(
+37
)﹣(﹣
24
)
(
2
)
|
﹣
32|
﹣
|< br>﹣(﹣
4
)
|
﹣
|
﹣
2|
36
.计算:
|
﹣
16.2|+|
﹣
2
|+[< br>﹣(﹣
3
)
]
﹣
|10.7|
37
.计算:
|6
﹣
5|+|
﹣
|
﹣
|
﹣< br>|+|4
﹣
|
.
38
.计算下列各题;
(
1
)
(﹣
5
)﹣(﹣
10
)
+
(﹣
32
)﹣(﹣
7
)
(
2
) ﹣
32
﹣
5
﹣(﹣
3
)
+3.25+2
+ |
﹣
28
|
39
.
0+1
﹣
[
(﹣
1
)﹣(﹣
)﹣(
+5
)﹣(﹣
)
] +|
﹣
4|
40
.计算:
(
1
)
(﹣
20
)
+
(
+3
)﹣(﹣
5)﹣(
+7
)
(
2
)
(﹣
)
+|0
﹣
5
|+|
﹣
4
|+
(﹣
9)
41
.计算
(
1
)
13+7< br>﹣(﹣
20
)﹣(﹣
40
)﹣
6
(
2
)
0.5+
(﹣
)﹣
2.75+
(﹣
)
(
3
)
(﹣
12
)﹣
5+
(﹣
14
)﹣(﹣
39
)
(
4
)
﹣
|
﹣
1
|
﹣(
+2
)﹣(﹣
2.75
)
(
5
)
第
5
页(共
19
页)
(< br>6
)
0.47
﹣
4
﹣(﹣
1.53
)﹣1
.
42
.计算
(
1
)﹣
8
﹣
12
(
2
)
12
﹣(﹣
18
)
+
(﹣
7
)﹣
15
(
3)
(
+
)﹣
﹣
+
(﹣
)
(
4
)
(﹣
5.5
)
+|
﹣
2.5|+
(﹣
3. 2
)﹣(
+4.8
)
(
5
)
6
+
(﹣
4.6
)
+
(﹣
)﹣
2.3
﹣(﹣
)
(
6
)
19
+
(﹣
5
)
+
(﹣
9
)﹣
1.25
.
43
.计算:
(
1
)
﹣(﹣
)
+
(
)
(
2
)﹣
2.4+3.5
﹣
4.6+3.5
(
3
)
|
﹣
3
|
﹣
|
﹣|+|
﹣
2
|
(
4
)
(﹣
8
)
+10+2+
(﹣
1
)
44
.计算:
(
1
)﹣
9+12
﹣
2+25
(
2
)
1
﹣(﹣
2
)
+|
﹣
2
﹣
3|
﹣
5
.
45
.计算:
(
1
)
(﹣
)
+
(
+
)
+
(
+
)
+
(﹣
1
)
(
2
)
(﹣
3
)
+
(
+8
)﹣(﹣
5
)
(
3
)
(﹣
3
)﹣(﹣
)
+
(﹣
0.5
)
+3
(
4
)
(
+3
)
+
(﹣
2
)﹣(﹣
5
)﹣(
+
)
(
5
)
(﹣
0.25
)
+
(﹣
3
)﹣
|
﹣
1
|
﹣(﹣
3
)
(
6
)
(
+
)
+
(
+17
)
+
(﹣
1
)﹣(
+7
)﹣(﹣< br>2
)
+
(﹣
)
46
.已知
|a
|
=
1
,
|
b
|
=
2,
|
c
|
=
3
,且
a
>
b< br>>
c
,求
a
+
b
﹣
c
的值.
47
.
(
1
)若
|
a
|
=< br>2
,
b
=﹣
3
,
c
是最大的负整数,求a
+
b
﹣
c
的值;
(
2
) 已知
a
>
0
,
b
<
0
,且
|a
|
<
|
b
|
,化简:
|
b
﹣
a
|+|
a
+
b
|
﹣
|
﹣b
|
.
第
6
页(共
19
页)
48
.
|
x
|
=
8
,
|
y
|
=
6
,求
x
+
y
的值;若
|
x< br>|
=
3
,
|
y
|
=
5
,且
|
x
﹣
y
|
=
y
﹣
x
, 再求
x
+
y
的值.
49
.若
|
a
|
=
2
,
|
b
|
=
3
,
|
c
|
=
6
,
|
a
+
b
|
=﹣(
a
+
b
)
,
|
b+
c
|
=
b
+
c
.计算
a
+
b
﹣
c
的值.
第
7
页(共
19
页)
初一计算题简单
参考答案与试题解析
一.解答题(共
49
小题)
1
.
【解答】
解:原式=
1
﹣
2+5
﹣
5
=﹣
1
.< br>
2
.
【解答】
解:
(
1
)
6+< br>(﹣
5
)﹣
2
﹣(﹣
3
)=
6+3
﹣
5
﹣
2
=
2
;
(
2
)
1+
(﹣
)﹣(﹣
)﹣
=
1
﹣(
+)
+
(
+
)=
2
;
(
3< br>)
(﹣
)
+
(﹣
)
+
(
+1
)=﹣
+
(
1
﹣
)=
;
(
4
)﹣
=(
﹣
)﹣(
+
)=
1
﹣
= ﹣
;
(
5
)
5.4
﹣
2.3+1.5< br>﹣
4.2
=(
5.4+1.5
)﹣(
2.3+4.2
)=
6.9
﹣
6.5
=
0.4
;
(6
)﹣
2
﹣
6
﹣
|
﹣
9+5|
=﹣
2
﹣
6
﹣
4
=﹣
12
.
3
.
【解答】
解:
①
原式=﹣
12+
(﹣
5
)
+
(﹣
14
)
+39
=﹣
31+39
=
8
;
②
原式=
21.76
﹣
7.26
﹣
3
=
14.5
﹣
3
=
11.5
;
③
原式=
3
﹣
+
+2
=
3+3
=
6
;
④
原式=﹣
16
﹣
29+7
﹣
11
=﹣
56+7
=﹣
49
.
4
.
【解答】
解:
(
1
)原式=﹣
3
;
< br>(
2
)原式=﹣
7
+6
﹣
5
=﹣
6
;
第
8
页(共
19
页)
(
3
)原式=
2.7
﹣
8.5
﹣
3.4+1.2
=
3.9
﹣
11.9
=﹣
8
;
(
4
)原式=﹣
3
﹣
2
﹣
4+1
=﹣
9+1
=﹣
8
;
(
5
)原式=﹣
1.2+2
+5
﹣
2.2
=﹣
3.4+8
=
4.6
;
(
6
)原式=﹣
205+400
=﹣
205+194
=﹣
10
.
5
.
【解答】
解:
(﹣
)
+3
+|
﹣
0.75|+
(﹣
5
)
+|
﹣
2
|
=
=
.
6
.
【解答】
解:
7
﹣(﹣
3
)
+
(﹣
5
)﹣
|
﹣
8|
=
7+3+
(﹣
5
)﹣
8
=﹣
3
.
7
.
【解答】
解:原式=﹣< br>1+
﹣
﹣
2
=﹣
.
﹣
204
﹣
1
8
.
【解答】
解 :
(
1
)﹣
13
﹣
7+20
﹣
40+16
=(
20+16
)﹣(
13+7+40
)
=
36
﹣
60
=﹣
24
;
< br>(
2
)﹣
﹣
|
﹣
|+
﹣(
+
)﹣(﹣
)
=(﹣
﹣
)
+
(
+
)
+
第
9
页(共
19
页)