五年级数学分数加减法计算题100要快一点，
尽量要有一百道题，
不行五十道题也可以。
第1个回答 2017-09-02
4/7+1/14-1/2
=8/14+1/14-7/14
=2/14
=1/7
5/3-3/8-5/8
=5/3-(3/8+5/8)
=5/3-1
=2/3
3/5+3/11+7/5+11
=(3/5+7/5)+11+3/11
=2+11+2/11
=13又2/11
3/4-｛5/6-1/3｝
=3/4-（5/6-2/6）
=3/4-1/2
=3/4-2/4
=1/4本回答被网友采纳
=8/14+1/14-7/14
=2/14
=1/7
5/3-3/8-5/8
=5/3-(3/8+5/8)
=5/3-1
=2/3
3/5+3/11+7/5+11
=(3/5+7/5)+11+3/11
=2+11+2/11
=13又2/11
3/4-｛5/6-1/3｝
=3/4-（5/6-2/6）
=3/4-1/2
=3/4-2/4
=1/4本回答被网友采纳
