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加法的简便运算 四年级 岳爱珍

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加法的简便运算 四年级 岳爱珍. 比比谁最棒。 78=80- 99=100- 574+200= 87=90- 101=100+ 453-300=. 1. 2. 774. 3. 1. 153. 1 、 113+59=113+60-1=. 172. 2 、 276+98=276+100. -. 2.

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加法的简便运算 四年级 岳爱珍

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  1. 加法的简便运算四年级 岳爱珍

  2. 比比谁最棒。 • 78=80- 99=100- 574+200= • 87=90- 101=100+ 453-300= 1 2 774 3 1 153 1、113+59=113+60-1= 172 2、276+98=276+100 - 2 =374

  3. 156+87=156+90 • 74+198= = 判断： 86+89=80+89+6=175 （ ） 99+136=136+100+1 （ ） 99+136=136+100+1 （ ）

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