问题 解答题
计算:
(1)2+(-4)-(-2)+4
(2)2÷(1-
1
3
)×(-
2
3

(3)5-(-2)2×2
(4)(
3
4
-
1
6
-
1
12
)×(-48)
答案

(1)2+(-4)-(-2)+4=2-4+2+4=4;

(2)2÷(1-

1
3
)×(-
2
3
)=2÷
2
3
×(-
2
3
)=2×
3
2
×(-
2
3
)=-2;

(3)5-(-2)2×2=5-4×2=5-8=-3;

(4)(

3
4
-
1
6
-
1
12
)×(-48)=
3
4
×(-48)-
1
6
×(-48)-
1
12
×(-48)=-36+8+4=-24;

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