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99x83十83的简便计算

原式=1x83+99x83=(1+99)x83=100x83=8300

83乘(99加1)等于83乘100等于8300

99*83 =(100-1)*83 =100*83-1*83 =8300-83 =8300-(100-17) =8300-100+17 =8200+17 =8217

(100-1)x83=100x83-1x83=8300-83=8217

99*85+85原式=85(99+1) =85*100 =8500

99X83=(100-1)x83=100x83-83=8300-83=8217

解:99乘83 =99X83 =(100-1)X83 =100X83-1X83 =8300-83 =8217

99X83十83=99X83十1X83=(99十l)X83=8300再看看别人怎么说的.

83后面没有落下+的话8399*83=8000*83+399*83=664000+400*83-83=664000+33200-83=69711783后有加的话,83+99*83=83*(1+99)=8300

99x87=(100-1)x87=100x87-1x87=8700-87=8613解析:经过观察,此题可用乘法636f707962616964757a686964616f31333431346339分配律,首先把算式中99变成100-1,然后分别和87相乘,得出的积相加得出结果,这样达到简便运算的目的

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