For questions 1-5 estimate the sum or difference.
1. 9/10 + 7/8
a) 1
b)2
c)0
2. 9/50 + 7/15
a)0
b) 1/2
c) 1
3. 2/8/9 - 2/1/7
a) 2
b) 1
c) 0
4. 8/12/31 + 4/5/6
a) 13
b) 12/1/2
c) 14
5. 15/2/15 - 15/1/20
a)2
b) 1
c) 0

1. 9/10 + 7/8 = 71/40 (or 1.775) so I'd say 2

2. 9/50 + 7/15 = 97/150 (or 0.64667...) so I'd say 1/2

3. is this 2/8 / 9 or 2 / 8/9 please let me know

4. is this 8/12 / 31 or 8 / 12/31 :)

5. is this 15/2 / 15 or 15 / 2/15

Please let me know the second halves of 3 through 5 as well! :)

Could you make it more clear?