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5.72x9.9十0.572的简便算法?

5.72x9.9十0.572=5.72x9.9+5.72x0.1=5.72x(9.9+0.1)=5.72x10=57.2

5.34x9.9十0.534 =5.34*9.9+5.34*0.1 =5.34*(9.9+0.1) =5.34*10 =53.4

8.17x9.9+0.817=8.17x9.9+8.17x0.1=8.17x(9.9+0.1)=8.17x10=81.7

15.2x9.9十15.2如何简便运算=15.2x(9.9+1)=15.2x10.9=15.2x10+15.2x0.9=152+13.68=165.68

8.52*9.9+0.852=8.52*9.9+8.52*0.1=8.52*(9.9+0.1)=8.52*10=85.2

14.2*9.9+1.42 =1.42*99+1.42 =1.42*(99+1) =142

5.71x9.9+0.571=5.71x9.9+5.71x0.1=5.71x(9.9+0.1)=5.71x10=57.1

56.5X9.9十5.65X1=56.5X9.9十56.5X0.1=56.5X(9.9十0.1)=56.5X10=565

你好!1.58x9.9+0.518 =1.58*(10-0.1)+0.518 =15.8+0.518-0.158 =15.8+0.36 =16.16 希望对你有所帮助,望采纳.

1.876乘以1

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