5⼀11×20-2⼀11×15+7⼀11用简便方法怎么算

2025-03-11 11:39:04

推荐回答（4个）

回答1：

5/11×20-2/11×15+7/11用简便方法怎么算
5/11×20-2/11×15+7/11 =5/11×20-5/11×6+7/11 =5/11×(20-6)+7/11 =5/11×14+7/11 =7/11×10+7/11 =7/11×(10+1) =7

回答2：

5/11×20-2/11×15+7/11
=5/11×20-5/11×6+7/11
=5/11×（20-6）+7/11
=5/11×14+7/11
=7/11×10+7/11
=7/11×（10+1）
=7

回答3：

11/15-11/15×2/7
=11/15×（1-2/7）
=11/15×5/7
=11/21

回答4：

5/11ⅹ20-2/11ⅹ15+7/11
=100/11-2/11ⅹ15+7/11
=（100/11+7/11）-2/11ⅹ15
=107/11-2/11ⅹ15
=107/11-30/11
=7