手脑速算直加直减试题

一位数直加直减

9-5-2-1+5+2-8+3= 9-5-4+7+2-5-3=

9-6+1-4+5+3-6+2= 2+5+2-5-3+6= 3+1-2+6-6+2= 4-2+1+5-7+3=

6-5+3-2+7-8= 2+1-3+4-2+6= 3+5-2-5+7-5= 6-5+3+5-8+3-2+6= 7-2+4-6-2-1= 2+2+5-6+5-1= 6-5+7-2-1+4= 1+3+5-7-1+6= 5+2+2-3-5-1= 5+2+2-3-5-1+8-7= 6-5+7-2+3-2-5-2= 8-7+2+6-9+4-3+2= 4+5-2-1-5+8-5-2= 5+2-6+3-4+7-2+1= 用手表示2.3.4的组成

本文来源：https://www.bwwdw.com/article/89hr.html