计算:(1)1-(-2)+8+(-3)-(+8)
(2)
(3)
(4)-22×5-(-2)3÷4.
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解:(1)1-(-2)+8+(-3)-(+8)
=1+2+8-3-8
=0;?????????????????
(2)-2+2÷(-)×2
=-2+2×(-2)×2
=-2-8
=-10;
(3)
=(1-+)×(-48)
=1×(-48)-×(-48)+×(-48)
=-48+8-36?
=-76;
(4)-22×5-(-2)3÷4
=-4×5+8÷4???
=-20+2????
=-18.
解析分析:(1)先去掉括号,再合并即可求出