Question

求大神解题

Answer 1

（3）
11/4 - 2x = 3/4
-2x = 3/4 - 11/4
-2x = -8/4
-2x = -2
x = 1

x + 1/8 = 7/12
x + 3/24 = 14/24
x = 14/24 - 3/24
x=11/24

x - 5/6 = 7/8
x - 20/24 = 21/24
x = 21/24 + 20/24
x = 41/24

2/7 + x = 1 - 1/3
6/21 + x = 2/3
6/21 + x =14/21
x = 14/21 - 6/21
x = 8/21

5.
五个数分别为 4/5 3/7 7/2 1 7/3
4/5 3/7 都小于1
7/2 7/3 都大于1
4/5 = 28/35
3/7 = 15/35
所以 3/7 ＜4/5
分子相同的情况下，分母越大，这个分数就越小
所以 7/3 < 7/2
所以顺序为 3/7 < 4/5 < 1 < 7/3 < 7/2