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0.45X12x0.2,0.87x5.2+4.64脱式计算

0.45X12x0.2 =(0.45x0.2)x12 =0.09x12 =1.08 0.87x5.2+4.64 =0.87x5+0.87x0.2+4.64 =4.35+0.174+4.64 =4.524+4.64 =9.164

=4.8x0.85+4.8×0.15 =4.8×(0.85+0.15) =4.8×1 =4.8

0.45x1.2x2 =0.45x2x1.2 =0.9x1.2 =9/10x12/10 =108/100 =1.08

问: 35.2+64.8÷0.5x1.2脱式计算 答: 35.2+64.8÷0.5x1.2 =35.2+129.6×1.2 =35.2+155.52 =190.72 答题完毕,谢谢采纳

45x2/3+15x1/3 =30+5 =35

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