五上数学计算题小数乘除法专项训练
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简介
2.5×4.8 =2.5×4×1.2 =10×1.2 =12 1.25×3.2×0.8 =1.25×0.8×3.2 =1×3.2 =3.2 3.2×1.25×0.25 =(0.8×1.25)×(4×0.25) =1×1 =1 5.6×0.5+4.4×0.5 =(5.6+4.4)×0.5 =10×0.5 =5 6.4×0.25+3.6×0.25 =(6.4+3.6)×0.25 =10×0.25 =2.5 9.6÷0.125÷8 =9.6÷(0.125×8) =9.6÷1 =9.6 5.4×101 =5.4×(100+1) =5.4×100+5.4×1 =540+5.4 =545.4 8.4×9.9+0.84 =8.4×9.9+8.4×0.1 =8.4×(9.9+0.1) =8.4×10 =84 4.8×7.8+4.8×2.2 =4.8×(7.8+2.2) =4.8×10 =48 0.25×36 =0.25×4×9 =1×9 =9
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