五年级上册数学小数乘除法简便计算专项练习
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简介
五年级上册数学小数乘除法简便计算专项练习 （必考题型，要求掌握） 1、计算下面各题，能简便计算的要简算。 0.84×13.5÷0.16 =11.34÷0.16 =70.875 96.5÷5÷0.2 =96.5÷(5×0.2) =96.5÷1 =96.5 1.25×88 =1.25×(80+8) =1.25×80+1.25×8 =100+10 =110 7.8+2.2×5.54 =7.8+12.188 =19.988 4.5×2.74-0.74×4.5 =4.5×(2.74-0.74) =4.5×2 =9 4.92÷(4.92×4) =4.92÷4.92÷4 =1÷4 =0.25 2、计算下面各题，能简便计算的要简算。 1.25×4.6×8 =(1.25×8)×4.6 =10×4.6 =46 1.5×99 =1.5×(100-1) =1.5×100-1.5×1 =150-1.5 =148.5 12.7÷(12.7×5) =12.7÷12.7÷5 =1÷5 =0.2 56×1.25 =7×8×1.25 =7×(8×1.25) =7×10 =70 71.8÷0.25÷4 =71.8÷(0.25×4) =71.8÷1 =71.8 1.6×3.5÷0.8 =1.6÷0.8×3.5 =2×3.5 =7
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