六年级简便计算题目。（要求过程）

Question

71×25/44+25×7/44=
25×7/13-7×12/13=

Answer 1

1、25+61+75+29
=（25+75）+（61+29）
=100+90
=190

2、26×131-31×26
=26×（131-31）
=26×100
=2600

3、25×1.25×32
=25×1.25×4×8
=（25×4）×（1.25×8）
=100×10
=1000

4、999.9+99.9+9.9+0.3
=1000-0.1+100-0.1+10-0.1+0.3
=1110-0.3+0.3
=1110

5、（20.2×0.4+7.88）÷4.2
=（8.08+7.88）÷4.2
=15.96÷4.2
=15.96÷0.6÷7
=26.6÷7
=3.8

6、（4/5+1/4）÷7/3+7/10
=21/20×3/7+7/10
=9/20+7/10
=9/20+14/20
=23/20
=1又3/20
求采纳为满意回答。

Answer 2

71×25/44+25×17/44
=71×25/44+17×25/44
=(71+17)×25/44
=88×25/44
=50
注：7应该是17才以实现简便计算。
25×7/13-7×12/13
=25×7/13-12×7/13
=(25-12)×7/13
=13×7/13
=7本回答被提问者采纳

Answer 3

71×25/44+25×7/44
=71×25/44+7×25/44
=(71+7)×25/44
=78×25/44
=975/22
25×7/13-7×12/13
=25×7/13-12×7/13
=(25-12)×7/13
=13×7/13
=7