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0.67x7.2 +6.7x0.28的简便算式怎么写?

0.91x7.2+9.1x0.28简便计算=0.91*(7.2+2.8)=0.91*10=9.1

=9.1*0.72+9.1*0.28=9.1*(0.72+0.28)=9.1*1=9.1

=6.9*7.2+6.9*2.8=6.9*(7.2+2.8)=6.9*10=69

0.72*7.2+2.7*0.28 =0.72x7.2+2.7x(1-0.72)=0.72x7.2+2.7-2.7x0.72 =2.7+0.72x(7.2-2.7) =2.7+0.72x4.5 =2.7+3.24 =5.94 谢谢,请采纳

2.01x67一1x0.67=2.01x67一0.01x67=(2.01-0.01)x67=2x67=134望采纳

1、0.67x7.2+0.67x2.8 =0.67*(7.2+2.8) =0.67*10 =6.7 2、1.5x102 =1*102+0.5*102 =102+51 =153

简便方法计算6.7x0.23+0.67x7.7=6.7x0.23+6.7x0.77=6.7*(0.23+0.77)=6.7*1=6.7

0.78x7.2=(1-0.32)x(7+0.2)=7+0.2-0.224-0.64=5.616

=6.7*0.38+6.7*0.62=6.7*(0.38+0.62) =67*1 =6.7 再看看别人怎么说的.

6.7x0.19 +0.67x8.1=6.7*0.19+6.7*0.81=6.7*(0.19+0.81)=6.7*1=6.7

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