Vote you brainiest please help me

Answer:
Step-by-step explanation:
In number 1 I think they did a typo so we can just put 6 3/4. So if you know what to do go for it :D
Hope this helps :D
Answer:
1. 7 5/8 2. 1/6 3. 2 2/9
Step-by-step explanation:
For number one, convert 3/4 to eights because we cant subtract fourths from eighths. It is 6/8. 7/8 + 6/8 = 13/8 = 1 5/8 . 1 5/8 + 6 = 7 5/8.
For number 2: We 2/3 to sixths because we cant subtract sixths from thirds. 2/3 = 4/6. 5/6 - 4/6 = 1/6.
For number 3: Just subtract. 8 - 5 7/9 = 2 2/9.