Where possible simplify the fraction
1. 2/5 + 2/3 =
2. 1/6 + 2/5 =
3. 4/7 + 2/3 =
4. 3/8 + 3/4 =
5. 4/9 + 4/7 =
6. 4/5 + 2/3 =
7. 2/3 + 2/5 =
8. 1 1/7 + 4 1/2 =
9. 1 3/4 + 1 4/7 =
10. 2 1/9 + 3 1/8 =
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