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1.35除27用乘法验算

1.35/27=0.05 验算:0.05*27=1.35 乘法用除法验算,除法用乘法验算

1.35÷27=0.05竖式计算过程如下图所示

1.35/27=0.05

15.6/12=156/120=(12*13)/12=13,328/16=(41*8)/(2*8)=41/2=20.5,1.35/27=(0.45*3)/(3*9)=0.45/9=0.05,0.646/19=(323*0.002)/19=(19*17*0.002)/19=17*0.002=0.034

=27/20*1/27=1/20=0.05

8.4%7=51.1%5=48.3%21=2.4%4=3.45%15=3.24%27=28.8%24=14.7%35=35%25=38.4%30=1.28%16=56.5%45=0.72%25=43.2%24=55.2%4=15%60=9.6%1.2=19.2%2.4=1.44%0.24=10%2.5=7.48%0.34=0.408%0.12=353.35%95.5=585%36=

1.35除37,列式是37÷1.35,商是循环小数 37÷1.35=27.407407……

1.35除27加1.35除27= 2X 27/1.35 =2X20=40

(1)15.6÷12=1.3验算:(2)328÷16=20.5验算:(3)1.35÷27=0.05(4)0.646÷19=0.034验算:

727除以27=2625 验算:26*27+25=727

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