简算 会做几道就几道
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/27 14:23:36
简算 会做几道就几道
![](http://img.wesiedu.com/upload/c/af/cafe4b6261d496b4b28d6522a42995e8.jpg)
![](http://img.wesiedu.com/upload/c/af/cafe4b6261d496b4b28d6522a42995e8.jpg)
![简算 会做几道就几道](/uploads/image/z/7279562-2-2.jpg?t=%E7%AE%80%E7%AE%97+%E4%BC%9A%E5%81%9A%E5%87%A0%E9%81%93%E5%B0%B1%E5%87%A0%E9%81%93%26nbsp%3B)
2.(3-1)*2 (4-1)(2+1) (5-1)(3+1) (4+1)*5 10
----------* ---------- * ---------- * --------- = ----
(2+1)(2-1) (3+1)(3-1) (4+1)(4-1) (5+1)(5-1) 6
---------是分号.
* 乘号
3.4 4 4
---(1+9+99+999+9999)= ---(10+100-1+1000-1+10000-1)= 11107 ---
5 5 5
----------* ---------- * ---------- * --------- = ----
(2+1)(2-1) (3+1)(3-1) (4+1)(4-1) (5+1)(5-1) 6
---------是分号.
* 乘号
3.4 4 4
---(1+9+99+999+9999)= ---(10+100-1+1000-1+10000-1)= 11107 ---
5 5 5