计算(1)22-(-4)+(-2)+4;(2)-1-2×(-3);(3)(-81)÷94×49÷(-136);(4)(79-56+34)×(-36);(5)0-...

2023-07-13 14:23发布

这道初中数学的题目是:
计算
(1)22-(-4)+(-2)+4;
(2)-1-2×(-3);
(3)(-81)÷
9
4
×
4
9
÷(-
1
36
);
(4)(
7
9
-
5
6
+
3
4
)×(-36);
(5)0-32÷[(-2)3-(-4)];
(6)(-3)2-[(-
2
3
)+(-
1
4
)]÷
1
12

(7)-14÷(-5)2×(-
5
3
)+|0.8-1|;
(8)-3×(-
2
3
2-4×(1-
2
3
)-8÷(
2
3
2
1条回答
特离谱
1楼-- · 2023-07-13 14:34
这道初中数学题的正确答案为:
(1)22-(-4)+(-2)+4
=22+4-2+4
=30-2
=28;

(2)-1-2×(-3)
=-1+6
=5;

(3)(-81)÷
9
4
×
4
9
÷(-
1
36

=81×
4
9
×
4
9
×36
=576;

(4)(
7
9
-
5
6
+
3
4
)×(-36)
=-
7
9
×36+
5
6
×36-
3
4
×36
=-28+30-27
=-55+30
=-25;

(5)0-32÷[(-2)3-(-4)]
=0-9÷[(-8)-(-4)]
=0-9÷(-4)
=0+2.25
=2.25;

(6)(-3)2-[(-
2
3
)+(-
1
4
)]÷
1
12

=9-[(-
2
3
)+(-
1
4
)]×12
=9+8+3
=20;

(7)-14÷(-5)2×(-
5
3
)+|0.8-1|
=-1÷25×(-
5
3
)+
1
5

=
1
15
+
1
5

=
4
15


(8)-3×(-
2
3
2-4×(1-
2
3
)-8÷(
2
3
2
=-3×
4
9
-4×
1
3
-8÷
4
9

=-1
1
3
-1
1
3
-18
=-20
2
3
解题思路 94

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