问题
解答题
计算:(1)1-(-2)+8+(-3)-(+8) (2)-2+2÷(-
(3)(1-
(4)-22×5-(-2)3÷4. |
答案
(1)1-(-2)+8+(-3)-(+8)
=1+2+8-3-8
=0;
(2)-2+2÷(-
)×21 2
=-2+2×(-2)×2
=-2-8
=-10;
(3)(1-
+1 6
)÷(-3 4
)1 48
=(1-
+1 6
)×(-48)3 4
=1×(-48)-
×(-48)+1 6
×(-48)3 4
=-48+8-36
=-76;
(4)-22×5-(-2)3÷4
=-4×5+8÷4
=-20+2
=-18.