计算(1)(-3.6)+(+2.5)(2)3-2×(-5)2(3)-24×(-56+38-112)(4)12+(-23)+45+(-12)+(-13)(5)-14-(1314-1112)×[4-(-2)2](6)5×(-6)-(-4)2÷(-8)(7)-7.2-0.9-5.6+1.7(8)(-135)+(-数学
题文
计算 (1)(-3.6)+(+2.5) (2)3-2×(-5)2 (3)-24×(-
(4)
(5)-14-(
(6)5×(-6)-(-4)2÷(-8) (7)-7.2-0.9-5.6+1.7 (8)(-1
|
答案
(1)(-3.6)+(+2.5)=-1.1; (2)3-2×(-5)2 =3-2×25 =3-50 =-47; (3)-24×(-
=24×
=20-9+2 =13; (4)
=(
=0-1+
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