13/26×7/12+5/26×13/12怎么简便运算?

问题描述:

13/26×7/12+5/26×13/12怎么简便运算?

13/26×7/12+5/26×13/12
=13/26×7/12+13/26×5/12
=13/26×(7/12+5/12)
=13/26x1
=13/26