计算(1)(-12)-(-314)+(+234)-(+512).(2)(-6)÷(-0.25)×1124.(3)-2+(1-0.2÷35)×(-3).(4)-14-16×[2-(-3)2].-数学
题文
计算(1)(-
(2)(-6)÷(-0.25)×
(3)-2+(1-0.2÷
(4)-14-
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答案
(1)(-
=(-
=[(-
=(-6)+6 =0; (2)(-6)÷(-0.25)×
=(-6)×(-4)×
=24×
=11; (3)-2+(1-0.2÷
=-2+(1-
=-2+
=-2+(-2) =-4; (4)-14-
=-1-
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