1/7+2/7 ;14/11 - 3/11 ; 2/3 + 5/6 ; 7/4 -3/8 ;1-9/10 ; 2-3/100 ; 1-3/7 ;2-5/3
Mathématiques
missglam88
Question
1/7+2/7 ;14/11 - 3/11 ; 2/3 + 5/6 ; 7/4 -3/8 ;1-9/10 ; 2-3/100 ; 1-3/7 ;2-5/3
1 Réponse
-
1. Réponse maudmarine
1/7 + 2/7 = 3/7
14/11 - 3/11 = 11/11 = 11 x 1 / 11 x 1 = 1/1 = 1
2/3 + 5/6 = 2 x 2 / 3 x 2 + 5/6 = 4/6 + 5/6 = 9/6 = 3 x 3 / 3 x 2 = 3/2
7/4 -3/8 = 7 x 2 / 4 x 2 - 3/8 = 14/8 - 3/8 = 11/8
1 - 9/10 = 1 x 10 / 1 x 10 - 9/10 = 10/10 - 9/10 = 1/10
2 - 3/100 = 2 x 100 / 1 x 100 - 3/100 = 200/100 - 3/100 = 197/100
1 - 3/7 = 1 x 7 / 1 x 7 - 3/7 = 7/7 - 3/7 = 4/7
2 - 5/3 = 2 x 3 / 1 x 3 - 5/3 = 6/3 - 5/3 = 1/3