题目内容

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.
(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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