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99x99+99 用简便方法怎样算

99x99+99 =99x(99+1) =99×100 =9900

简便方法: 99x99+99 =99x99+99x1 =99x(99+1) =99x100 =9900

=99X99+99+100 =99X(99+1)+100 =99X100+100 =(99+1)X100 =100X100 =10000 望采纳

解: 99x99x99 =99X(100-1)(100-1) =99X(100-1)² =99X[100²-2X100X1+1²] =99X(10000-200+1) =99X10000-99X200+99 =990000-19800+99 =970299

怎样简便计算 49x99+99 =99X(49十1) =99x50 =4950

4.75x99+4.75d 简便计算方法: 4·75×99+4·75×1 =4·75×(99+1) =4·75×100 =475 例如1x99+1用简便的计算方法:99个1加上1个1即为100个1, 1x99+1=1×(99+1)=1×100=100 例如99x99+99用简便的计算方法:99个99加上1个99即为100个99, 99x99+99=99×...

99+49x99 =99x(1+49) =(100-1)x50 =100x50-50 =5000-50 =4950

68x99+99 =(68+1)x99 =69x99 =69x(100-1) =69x100-69x1 =6900-69 =6831

=99*99+100+99 =99*(99+1)+100 =99*100+100 =(99+1)*100 =100*100 =10000

99+99*99=(99+1)*99=100*99=9900

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