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99x45十45用啥方法计算

99x46十45 解:简便计算=99x(45+1)+45x1=99x45+99x1+45x1=(99+1)x45+99 乘法分配律=100x45+99=4500+99=4599 祝学习进步.

99x45+45 就等于99x45+45x1简便计算就是(99+1)x45=100x45=4500

99x45十45=45x(99+1)=45x100=4500

99x45十44=99x45十45-1=(99+1)x45-1=100x45-1=4500-1=4499

分配律,结合律

99x46十46=46x(99+1)=46x100=4600

45*99+45=45*(99+1)=45*100=4500

99x48十99=99x(48十1)=99x49=(100-1)x49=100x49-1x49=4900-49=4851

100*45+10*454545

99x41+41=(99+1)x41=100x41=4100

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