5.76*9.9+0.576用简便方法计算=5.76x9.9+5.76x0.1=5.76x(9.9+0.1)=5.76x10=57.6

0.576+5.76*9.9=5.76*0.1+5.76*9.9=5.76*(0.1+9.9)=5.76*10=57.6

=5,68x(9.9+1)=5.68x10=56,8

5.76x109一57.6x0.9=5.76x(109-9)=5.76x100=576

0.532+5.32x9.9=0.532+0.532x99=0.532x100=53.2也可以是=53.2x0.01+53.2x0.99=53.2x1=53.2

解:0.47*9.9 =0.47*10-0.1 =0.47*10-0.47*0.1 =4.7-0.047 =4.653.

你好!66.2X9.9 =66.2X(10-0.1) =66.2X10-66.2X0.1 =662-6.62 =655.38 仅代表个人观点,不喜勿喷,谢谢.

0.56X9.9=0.56x(10-0.1)=0.56x10-0.56x0.1=5.6-0.056=5.544 希望能帮到你!

没看懂什么意思?

=45.6*10-45.6*0.1=456-4.56=451.44