Réponse :
bonsoir
2/7+4/9=18/63+28/63=46/63
3/8-5/3=9/24-40/24=-31/24
-4/5-7/9=-36/45-35/45=-71/45
1+2/9=9/9+2/9=11/9
1-7/3=3/3-7/3=-4/3
3+3/4=12/4+3/4=15/4
Explications étape par étape
Bonsoir
2/7 +4/9 = 2/7 X 9/9 +4/9 X 7/7 = 18/63 +28/63 = 46 /63
3/8 -5/3 = 3/8 X 3/3 -5/3 X 8/8 = 9/24 -40/24 = -31/24
-4/5 -7/9 = -4/5 X 9/9 -7/9 X 5/5 = -36/45 -35/45 = -71/45
1 +2/9 = 1 X 9/9 +2/9 = 9/9 +2/9 = 11/9
1 -7/3 = 1 X 3/3 -7/3 = 3/3 -7/3 = -4/3
3 + 3/4 = 3 X 4/4 +3/4 = 12/4 +3/4 = 15/4
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Réponse :
bonsoir
2/7+4/9=18/63+28/63=46/63
3/8-5/3=9/24-40/24=-31/24
-4/5-7/9=-36/45-35/45=-71/45
1+2/9=9/9+2/9=11/9
1-7/3=3/3-7/3=-4/3
3+3/4=12/4+3/4=15/4
Explications étape par étape
Réponse :
Bonsoir
Explications étape par étape
2/7 +4/9 = 2/7 X 9/9 +4/9 X 7/7 = 18/63 +28/63 = 46 /63
3/8 -5/3 = 3/8 X 3/3 -5/3 X 8/8 = 9/24 -40/24 = -31/24
-4/5 -7/9 = -4/5 X 9/9 -7/9 X 5/5 = -36/45 -35/45 = -71/45
1 +2/9 = 1 X 9/9 +2/9 = 9/9 +2/9 = 11/9
1 -7/3 = 1 X 3/3 -7/3 = 3/3 -7/3 = -4/3
3 + 3/4 = 3 X 4/4 +3/4 = 12/4 +3/4 = 15/4