问题 解答题
计算下列各题
(1)-1.5+1.4-(-3.6)-4.3+(-5.2)
(2)(-
3
7
)×0.125×(-2
1
3
)×(-8)

(3)(-48)÷
7
4
÷(-12)×
7
4

(4)5÷[
1
2
-(-1+
2
3
)]×4.
答案

(1)-1.5+1.4-(-3.6)-4.3+(-5.2)

=(-1.5-4.3-5.2)+(1.4+3.6)

=-11+5

=-6;

(2)(-

3
7
)×0.125×(-2
1
3
)×(-8)

=-(

3
7
×
7
3
)×(0.125×8)

=-1×1

=-1;

(3)(-48)÷

7
4
÷(-12)×
7
4

=(48×

1
12
)×(
4
7
×
7
4

=4×1

=4;

(4)5÷[

1
2
-(-1+
2
3
)]×4

=5÷[

1
2
+
1
3
]×4

=5÷

5
6
×4

=6×4

=24.

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