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
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