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58x98怎简便计算

58X98=58x(100-2)=58x100-58x2=5800-116=5684

58X100-58X2=5684

58*100-58*2

=56x(100-98) =56x100-56x2 =5600-112 =5488

58*98=58*(100-2)=58*100- 58*2=5800- 116=5684

原式=55*(100-2)=5500-110=5390.

原式=59x98+59x2=59x(98+2)=59x100=5900 供参考.

98*58=(100-2)*58=100*58-2*58=5800-116=5684

原式=0.58x98+0.58x100x0.02=0.58x98+0.58x2=0.58x(98+2)=0.58x100=58或者=0.58x100x0.98+58x0.02=58x0.98+58x0.02=58x(0.98+0.02)=58x1=58供参考.

58x98 =58x(100-2) =5800-116 =5684

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