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5.2*3.7 10.4*2.1 0.52*21怎么简便算法

6.3*5.2+5.2*3.7=5.2*(6.3+3.7)=5.2*10=52

= 0.52 * (7.9+2.1+0.1)=0.52*(10+0.1) = 5.252 .

3.7*(10-5.2)=3.7x4.8=3.7x(5-0.2)=3.7x5-3.7x0.2=18.5-0.74=18.5-1+0.26=17.5+0.26=17.76

5.2*7.3+ 0.52*27=5.2x7.3+5.2x2.7=5.2x(7.3+2.7)=5.2x10=52

5.2*10.21的简便算法法怎么算5.2*10.21=5.2*(10+0.2+0.01)=5.2*10+5.2*0.2+5.2*0.01=53.092

5.2*9.8+0.52*20 =5.2*(9.8+0.2) =5.2*10 =52 你好,本题已解答,如果满意 请点右上角“采纳答案”.

1.5

原式=1.38+19.24÷2/3.7*5.2=1.38+0.5=1.88

=3.7*5.2+4.8*(3.7+0.1)=3.7*5.2+4.8*3.7+4.8*0.1=3.7*(5.2+4.8)+0.48=3.7*10+0.48=37.48

5.2*3.7=(5+0.2)*3.7=5*3.7+0.2*3.7=18.5+0.74=19.24 4.8*3.7=(5-0.2)*3.7=5*3.7-0.2*3.7=18.5-0.74=17.76

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