计算题:(1)(+7)+(-8)-(+3)-(-4);(2)-113-213÷(-32)×(-3);(3)-36×(19-16-118);(4)-13-(1-0...

2023-07-08 18:35发布

这道初中数学的题目是:
计算题:
(1)(+7)+(-8)-(+3)-(-4);
(2)-1
1
3
-2
1
3
÷(-
3
2
)×(-3);
(3)-36×(
1
9
-
1
6
-
1
18
);
(4)-13-(1-0.5)×
1
3
×[2-(-3)2];
(5)(-0.25)×1.25×(-4)×(-8);
(6)(-1)10×2+(-2)3÷4.
1条回答
老树皮乐队
2023-07-08 18:53
这道初中数学题的正确答案为:
(1)(+7)+(-8)-(+3)-(-4)
=7-8-3+4
=11-11
=0;
(2)-1
1
3
-2
1
3
÷(-
3
2
)×(-3)
=-1
1
3
-
7
3
×(-
2
3
)×(-3)
=-1
1
3
-4
2
3

=-6;
(3)-36×(
1
9
-
1
6
-
1
18

=(-36)×
1
9
+(-36)×(-
1
6
)+(-36)×(-
1
18

=-4+6+2
=-4+8
=4;
(4)-13-(1-0.5)×
1
3
×[2-(-3)2]
=-1-
1
2
×
1
3
×(2-9)
=-1+
7
6

=
1
6

(5)(-0.25)×1.25×(-4)×(-8)
=(-0.25)×(-4)×[1.25×(-8)]
=1×(-10)
=-10;
(6)(-1)10×2+(-2)3÷4
=1×2+(-8)÷4
=2-2
=0.
解题思路 13

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