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317 99 83简便运算

317-100+1=216

=83*(100-1)=83*100-83*1=8300-83=8217

99乘83简便计算怎么做99乘83=83*(100-1)=83*100-83=8300-83=8217

原式=99x83=(100-1)x83=100x83-1x83=8300-83=8217 供参考.

小学四年级下册简便计算83*99 83*99 =83*(100-1) =83*100-83*1 =8300-83 =8217

99*83=(100-1)*83=100*83-1*83=8300-83=8217

=78*(100-1)=7800-78=7722

83*99=83*(100-1)=83*100-83*1=8300-83=8217

简便计算99*83+83=(99+1)x83=100x83=8300

100X83-83

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