问题 解答题
计算:(1)1-(-2)+8+(-3)-(+8)
(2)-2+2÷(-
1
2
)×2

(3)(1-
1
6
+
3
4
)÷(-
1
48
)

(4)-22×5-(-2)3÷4.
答案

(1)1-(-2)+8+(-3)-(+8)

=1+2+8-3-8

=0;                 

(2)-2+2÷(-

1
2
)×2

=-2+2×(-2)×2

=-2-8

=-10;

(3)(1-

1
6
+
3
4
)÷(-
1
48
)

=(1-

1
6
+
3
4
)×(-48)

=1×(-48)-

1
6
×(-48)+
3
4
×(-48)

=-48+8-36 

=-76;

(4)-22×5-(-2)3÷4

=-4×5+8÷4   

=-20+2    

=-18.

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