Bonjour;
1-(2/ 4 +1/ 4)
1- 3/4
= 4/4-3/4
= 1/4
3-(5/ 2) /(1+1/ 5)
= (6/2-5/2) / (5/5 +1/5)
= ( 1/2 )/ (6/5)
= 1/2 * 5/6
= 5/12
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Bonjour;
1-(2/ 4 +1/ 4)
1- 3/4
= 4/4-3/4
= 1/4
3-(5/ 2) /(1+1/ 5)
= (6/2-5/2) / (5/5 +1/5)
= ( 1/2 )/ (6/5)
= 1/2 * 5/6
= 5/12