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0.58×9.9的简便算法

0.58x9.9 =0.58x(10-0.1) =0.58x10-0.58x0.1 =5.8-0.058 =5.742

0.58x9.9 =0.58x(10-0.1) =0.58x10-0.58x0.1 =5.8-0.058 =5.742 谢谢,请采纳

0.58+8.5×9.9 =8.5x0.1-0.27+8.5×9.9 =8.5x(0.1+9.9)-0.27 =85-0.27 =84.73

0.58×19.9 =0.58×(20-0.1) =0.58×20-0.58×0.1 =11.6-0.058 =11.542

解:3.58×9.9+0.058 =3×9.9+0.58×9.9+0.58×0.1 =3×10-3×0.1+0.58×(9.9+0.1) =30-0.3+5.8 =35.5 (望采纳,谢谢)

0.058+9.9×0.58 =0.58×0.1+9.9×0.58 =0.58×(0.1+9.9) =0.58×10 =5.8

1.58乘九点9+0点158 =1.58x9.9+1.58x0.1 =1.58x(9.9+0.1) =1.58x10 =15.8 希望能帮到你

5.58×9.8+0.58×2=5.58✘9.8+5.8✘0.2=5.58✘(9.8+0.2)=5.58✘10=55.8

=5.8×9.9+5.8×0.1 =5.8×(9.9+0.1) =5.8×10 =58

6.58*99.9+0.658 =6.58*99.9+6.58*0.1 =6.58*(99.9+0.1) =6.58*100 =658

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