简便计算 1. 5x5/8+7x5/8=? 2. 3/4x5/7-3/4x1/7=? 3. 7/8x3/17x5/7=? 4. 11/19x2/7x5/11
展开全部
1. 5x5/8+7x5/8
=5/8x(5+7)
=12x5/8
=15/2
2. 3/4x5/7-3/4x1/7
= 3/4x(5/7-1/7)
=3/4x4/7
=3/7
3. 7/8x3/17x5/7
=7/8x5/7x3/17
=5/8x3/17
=15/136
4. 11/19x2/7x5/11
=11/19x5/11x2/7
=5/19x2/7
=10/133
=5/8x(5+7)
=12x5/8
=15/2
2. 3/4x5/7-3/4x1/7
= 3/4x(5/7-1/7)
=3/4x4/7
=3/7
3. 7/8x3/17x5/7
=7/8x5/7x3/17
=5/8x3/17
=15/136
4. 11/19x2/7x5/11
=11/19x5/11x2/7
=5/19x2/7
=10/133
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
