计算(1)(-12)-(-314)+(+234)-(+512).(2)(-6)÷(-0.25)×1124.(3)-2+(1-0.2÷35)×(-3).(4)-1...

2023-07-09 01:43发布

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

(2)(-6)÷(-0.25)×
11
24

(3)-2+(1-0.2÷
3
5
)×(-3)

(4)-14-
1
6
×[2-(-3)2]
1条回答
余夕阳
1楼-- · 2023-07-09 01:52
这道初中数学题的正确答案为:
(1)(-
1
2
)-(-3
1
4
)+(+2
3
4
)-(+5
1
2
)

=(-
1
2
)+3
1
4
+2
3
4
+(-5
1
2
)

=[(-
1
2
)+(-5
1
2
)]+(3
1
4
+2
3
4

=(-6)+6
=0; 

(2)(-6)÷(-0.25)×
11
24

=(-6)×(-4)×
11
24

=24×
11
24

=11;

(3)-2+(1-0.2÷
3
5
)×(-3)

=-2+(1-
1
5
×
5
3
)×(-3)
=-2+
2
3
×(-3)
=-2+(-2)
=-4;

(4)-14-
1
6
×[2-(-3)2]
=-1-
1
6
×[2+(-9)]
=-1-
1
6
×(-7)
=-1+
7
6

=
1
6
解题思路 12

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