计算(1)1+(-2)+|-2-3|-5-(-9)(2)113×(13-12)×311÷54(3)(512+23-34)×(-12)(4)0.25×(-2)3-...

2023-07-12 23:06发布

这道初中数学的题目是:
计算
(1)1+(-2)+|-2-3|-5-(-9)
(2)
11
3
×(
1
3
-
1
2
3
11
÷
5
4

(3)(
5
12
+
2
3
-
3
4
)×(-12)

(4)0.25×(-2)3-[4÷(-
2
3
)2+1]+(-1)5
1条回答
亲哦为
1楼-- · 2023-07-12 23:11
这道初中数学题的正确答案为:
(1)1+(-2)+|-2-3|-5-(-9)
=1-2+5-5+9
=-1+0+9
=8;

(2)
11
3
×(
1
3
-
1
2
3
11
÷
5
4

=
11
3
×(-
1
6
)×
3
11
×
4
5

=
11
3
×
11
3
×(-
1
6
)×
4
5

=1×(-
2
15

=-
2
15


(3)(
5
12
+
2
3
-
3
4
)×(-12)

=-
5
12
×12-
2
3
×12+
3
4
×12
=-5-8+9
=-4;

(4)0.25×(-2)3-[4÷(-
2
3
)2+1]+(-1)5

=-0.25×8-[4×
9
4
+1]-1
=-2-[9+1]-1
=-2-10-1
=-13.
解题思路 113

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