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5.8x0.53.1x0.9简便计算

5.8x0.53.1x0.9=2.9-2.79=0.11

9.1*5.3+5.3*0.9简便计算,9.1*5.3+5.3*0.9=5.3*(9.1+0.9)=5.3*10=53

9.42*10-94.2*0.9=9.42*10-9.42*9=9.42*(10-9)=9.42*1=9.42

4.64一4.64x0.9=4.64x(1-0.9)=4.64x0.1=0.464

9.52X10-95.2X0.9=95.2X(1-0.9)=95.2X0.1=9.52

运用乘法分配律.1.9*0.90.9=1.9*0.91*0.9=(1.91)*0.9=0.9*0.9=0.81

3.05÷3.05*0.9*0.9=1*0.9*0.9=0.81

=2.64*0.9+2.64*0.1 =2.64*(0.9+0.1)=2.64*1 =2.64

67.2x0.9=67.2*(1-0.1)=67.2-6.72=60.48望采纳,谢谢

158.7-58.7*0.9=100+58.7-58.7x0.9=100+58.7x(1-0.9)=100+58.7x0.1=100+5.87=105.87

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