题目
脱式计算,能简算的要简算.
(1)
18.2﹣5.3﹣4.7+1.8
(2)
[1﹣( + )]
(3)
0.75×56%+ ×0.44
(4)
24×( + ﹣ )
答案: 解:18.2﹣5.3﹣4.7+1.8 =(18.2+1.8)﹣(5.3+4.7) =20﹣10 =10
解:[1﹣( 14 + 38 )] ÷14 =[1﹣ 58 ] ÷14 = 38 ÷ 14 = 32
解:0.75×56%+ 34 ×0.44 =0.75×(0.56+0.44) =0.75×1 =0.75
解:24×( 23 + 56 ﹣ 712 ) =24× 23 +24× 56 ﹣24× 712 =16+20﹣14 =22