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Sagot :

4/7 + 2/3= 12/21+14/21=26/21
2/3 + 1/8=16/24+3/24=19/24
3/5 + 2/9=27/45+10/45=37/45
2/7-4/5=10/32-28/35=-18/35
-3/4-5/7=-21/28-20/28=-41/28
-5/3+7/4=-20/12+21/12=1/12


5-7/4=20/4-7/4=13/4
-6-1/3=-18/3-1/3=-19/3
-2+18/7=-14/7+18/7=4/7

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