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6.5x0.99 0.065简便计算

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

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

简便计算过程如下6.5*99=6.5*(100-1)=6.5*100-6.5*1=650-6.5=643.5望采纳

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

4.65*32+2.5*46.5+0.465*430=4.65*32+25*4.65+4.65*43=4.65*32+25+43=4.65*100 =465

6.5x99+6.9=6.9x100=690

6.5*9.9=6.5*(10-0.1)=65-0.65=64.35

6.5x9.9=6.5x(10-0.1)=6.5x10-6.5x0.1=65-0.65=64.35满意请采纳.

6.5x2.05=6.5x(2+0.05)=6.5x2+6.5x0.05=13+0.325=13.325

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