计算(1)-20+(-14)-(-18)-13(2)1-47+15-37+95(3)289×(-36)(用简便方法计算)(4))10+(-2)2×(-5)(5)(-25)÷54×45÷(-16)(6)(-24)×(16-14+12)-数学
题文
计算 (1)-20+(-14)-(-18)-13 (2)1-
(3)2
(4))10+(-2)2×(-5) (5)(-25)÷
(6)(-24)×(
|
答案
(1)-20+(-14)-(-18)-13 =-20-14+18-13 =-29; (2)1-
=1-(
=1-1+2 =2; (3)2
=(3-
=3×(-36)-
=-108+4 =-104; (4))10+(-2)2×(-5) =10+4×(-5) =10-20 =-10; (5)(-25)÷
=25×
=1; (6)(-24)×(
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