www.fltk.net > 97x56用简便计算

97x56用简便计算

97x56 =56x(100-97) =56x100-56x3 =5600-168 =5432

用简便计算 99X56 =100×56-56 =5600-56 =5544

这个一般用乘法分配律来做,一般情况下把一个数看作整十整百数来做, 在这里可以把98看做100-2 98×56 =(100-2)×56 =100×56-2×56 =5600-112 =5488

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

解析:125是一个特殊的数字,有固定的搭配的数字,所以就是需要找到125相乘的8,所以需要把56拆分成8乘以7,有利于简便计算。 125×56 =125×(8×7)(把56拆分成8×7) =125×8×7(按顺序计算125乘以8得到整千数,使计算简单) =1000×7 =7000 扩展...

58x56减56x56的简便算法 =(58-56)x56 =2x56 =112

=5040

56x125的简便计算 解:根据拆分法和结合律的运用, 原式=7x8x125 =7x1000 =7000

75X56-56X25 =(75+25)x56 =100x56 =5600

网站地图

All rights reserved Powered by www.fltk.net

copyright ©right 2010-2021。
www.fltk.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com