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98 45 90简便计算

45*98+90=45*98+45*2=45*(98+2)=45*100=4500

98*45+90=98*45+2*45=(98+2)*45=100*45=4500

98*45加九十用简便方法怎么算98*45加九十=45*98+45*2=45*(98+2)=45*100=4500

=45x98+45x2 =45x(98+2) =45x100 =4500

4410

解:90+98x45=2x45+98x45=(2+98)x45=100x45=4500

98*45简便计算=(100-2)x45=100x45-2x45=4500-90=4410

98*45 =(100-2)*45 =100*45-2*45 =4500-90 =4410

45*98=45*100-45*2=4500-90=4410

98*45 =(100-2)*45 =100*45-2*45 =4500-90 =4410

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