①56-34+23-12②23÷(-49)×(-23)2③(-3)2×23-(-4)÷2④(14-136-16-112)÷(-148)⑤-14÷(-5)2×(-

①56-34+23-12②23÷(-49)×(-23)2③(-3)2×23-(-4)÷2④(14-136-16-112)÷(-148)⑤-14÷(-5)2×(-

题型:解答题难度:一般来源:不详
5
6
-
3
4
+
2
3
-
1
2

②23÷(-
4
9
)×(-
2
3
2
③(-3)2×23-(-4)÷2
④(
1
4
-
1
36
-
1
6
-
1
12
)÷(-
1
48

⑤-14÷(-5)2×(-
5
3
)+|0.8-1|
答案
5
6
-
3
4
+
2
3
-
1
2

=
10
12
-
9
12
+
8
12
-
6
12

=
3
12
=
1
4


②23÷(-
4
9
)×(-
2
3
2
=8×(-
9
4
)
×
4
9

=-8;

③(-3)2×23-(-4)÷2,
=9×8+2,
=74;

④(
1
4
-
1
36
-
1
6
-
1
12
)÷(-
1
48
),
=(
1
4
-
1
36
-
1
6
-
1
12
)×(-48),
=-12+
4
3
+8+4,
=
4
3


⑤-14÷(-5)2×(-
5
3
)+|0.8-1|,
=-1×
1
25
×(-
5
3
)+
1
5

=
4
15
举一反三
下列运算中,正确的是(  )
A.-15-5=-10
B.-0.25ab-(+
1
4
ab)=0
C.3a2+2a3=5a5
D.3
4
7
×(-3.14)-6
3
7
×3.14=-31.4
题型:单选题难度:一般| 查看答案
计算:
(1)(-20)+(+3)-(-5)-(-7);
(2)(-
3
4
-
7
9
+
5
12
)×(-36)

(3)-22×(-5)-6÷(-2)2×|-
1
4
|
题型:解答题难度:一般| 查看答案
计算:(1)1-(-2)+8+(-3)-(+8)
(2)-2+2÷(-
1
2
)×2

(3)(1-
1
6
+
3
4
)÷(-
1
48
)

(4)-22×5-(-2)3÷4.
题型:解答题难度:一般| 查看答案
计算:
(1)(-2)×(-5)×0.1
(2)16÷(-2)3-(-
1
8
)×(-4)

(3)(
1
2
-
5
6
-
3
5
)×30

(4)-24-
1
2
×[5-(-3)2]
题型:解答题难度:一般| 查看答案
-92+2×(-3)2-(-6)÷(-
4
3
)
题型:解答题难度:一般| 查看答案
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