计算:(1)-23÷49×(-23)2(2)[1-(1-0.5×13)]×[2-(-3)2].(3)-|-3+213|-|-13|2+(-13)2×(-1)9×(-2)3(4)-22×(-3.14)-3.14×(-12)×(-6);(5)(74-78-712)÷(-78)+(-83).-数学
题文
计算: (1)-23÷
(2)[1-(1-0.5×
(3)-|-3+2
(4)-22×(-3.14)-3.14×(-
(5)(
|
答案
(1)-23÷
=-8×
=-8; (2)[1-(1-0.5×
=[1-(1-
=[1-
=
=-
(3)-|-3+2
=-
=-
|