0.9949和0.9959保留到百分位是多少?巧算2007*(3.2*65+3.3)/(3.3*65-3.2)

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0.9949和0.9959保留到百分位是多少?巧算2007*(3.2*65+3.3)/(3.3*65-3.2)
0.9949和0.9959保留到百分位是多少?
巧算2007*(3.2*65+3.3)/(3.3*65-3.2)

0.9949和0.9959保留到百分位是多少?巧算2007*(3.2*65+3.3)/(3.3*65-3.2)
0.9949保留到百分位是0.99;0.9959保留到百分位是1.00;
2007*(3.2*65+3.3)/(3.3*65-3.2)
=2007*(32*65+33)/(33*65-32)
=2007*(32*65+32+1)/(33*64+33-32)
=2007*(32*66+1)/(33*64+1)
=2007*(32*33*2+1)/(33*32*2+1)
=2007