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39乘以99的简便方法

99乘以 39 加39 =99*39+1*39 =39*(99+1) =39*100 =3900

39*99+39 =39*99+39*1 =39*(99+1) =39*100 =3900

=58*(100-1)=58*100-58*1=5800-58=5742

39*99+99怎么简便计算= 39*99+1x99= (39+1) x 99= 40 x( 100-1)= 4000 -40 = 3960

39x99+99=99x(39+1)=99x40=3960

39*99-39=39*(99- 1)=39*98=39*(100-2)=39*100-39*2=3900-78=3822

39加99乘三九=39x(1+99)=39x100=3900

39*(1+99)=3900

99x39-39x89=39x(99-89)=39x10=390希望能帮到你!

39*(100-1)=3900-39 = 3861

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