问题 解答题
计算:
(1)(-12)-5+(-14)-(-39)
(2)(
2
3
-
3
8
+
5
24
)×48

(3)(-18)÷2
1
4
×
4
9
÷(-16)

(4)-63×(-
1
6
)2-72
答案

(1)原式=-12-5-14+39=-31+39=8;

(2)原式=

2
3
×48-
3
8
×48+
5
24
×48=32-18+10=24;

(3)原式=-18×

4
9
×
4
9
×(-
1
16
)=
1
18

(4)原式=-63×

1
62
-49=-6-49=-55.

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