How do I estimate these?

Question

1. 7/8 + 3 1/4

2. 5 1/9 - 2/3

3. 9 5/6 divided 2 1/8

4. 6 divided 1/2

Answer 1

7/8 is about 1, 3 1/4 is about 3, 1+3=4? And follow the same pattern for th rest. That's how i would estimate it :s
And an example for division is 9 5/6 is about 10, 2 1/8 is about 2, 10 / 2 = 5.
Hopes this helps

Answer 2

Thanks! can you please show me how to do these:

2 1/3 x 3 1/2

4 2/3 divided 7