you need to add +9 +9-7 = +2
nine add 7 to get from -7 to 0 then add 2 to get to 2 7 + 2 = 9
9
- 8 + 17 = 9 =========
2/9 + 2/3 = 2/9 + 6/9 = 8/9
you need to add +9 +9-7 = +2
nine add 7 to get from -7 to 0 then add 2 to get to 2 7 + 2 = 9
9
You need to add 6 - (-9) = 6 + 9 = 15.
10 - (-9) = 19
It is: -9+16 = 7
- 8 + 17 = 9 =========
9 - (-6) = 9 + 6 = 15
We know that a half is 1/2 as a fraction, but we can multiply the numerator and denominator by 9 and 1/2 is 9/18. The least number of ninths we can add is 1. So we add 1/9 + 9/18 which is 2/18+9/18 or 11/18. We can write this as (11/2)/9 or 5.5/9 which is 5.5 ninths.
2/9 + 2/3 = 2/9 + 6/9 = 8/9
you need to add 10
11