bonjour
7/3 + 5/12
= 28/12 + 5/12
= 33/12
= 11 /4
5/6 + 7/3
= 5 /6 + 14 /6
= 19/6
3/2 + 1/4 - 3 /8
= 12/8 + 2 /8 - 3 /8
= 11/8
3/ 4 + 5/6
= 9/12 + 10 /12
= 19/12
3 + 2/3 + 4 /9
= 27/9 + 6/9 + 4 /9
= 37/9
2 + 1/10 + 7/100
200/100 + 10 /100 + 7/100
= 217/100