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99x56用简便方法计算

=(100-1)*56 =100*56-1*56 =5600-56 =5544

用简便计算 99X56 =100×56-56 =5600-56 =5544

99x56+56 =(99+1)x56 =100x56 =5600

99x56 十56 =56x(99+1) =56x100 =5600 祝天天向上。

99×56+56 =56×(99+1) =56×100 =5600

解: 25+137+75 =(25+75)+137 =237 99x56+56 =(99+1)x5

如图所示望采纳

67*56+64*28=67*2*28+64*28 =(67*2+64)*28=(134+64)*

23/56×57 =23/56×56+23/56×1 =23+23/56 =23又56分之23 10

如图

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