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6.5x0.99 0.065简便计算

解:6.5÷0.065x0.99=6500÷65x0.99=100*0.99=99

2.6x0.99=2.6x(1-0.01)=2.6-2.6x0.01=2.6-0.026=2.574

简便计算方法如下,可以使用拼凑法解答,将0.99转化为1-0.01,然后等式=6.33x(1-0.01)=6.33-0.0633=6.2667

6.5*0.99+0.065=6.5*(0.99+0.01)=0.65*1=0.65

=6.5*(1.9-0.9)=6.5*1=6.5

6.5*99=6.5*(100-1)=65*100-65*1=6500-65=6435

6.5x99+6.9=6.9x100=690

=6.5x(1.98+0.02)-6.5x0.02=13-0.13=12.87

0.65x6.4-6.5x0.54+65x0.09=0.65x6.4-0.65x5.4+0.65x9=0.65x(6.4-5.4+9)=6.5

6.5X99+6.5=6.5X(99+1)=6.5X100=650 望采纳

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