Réponse :
Explications étape par étape
Bonjour,
compléter ces égalités:
a.4/3=.../9=.../15=40/...=48/...=1,2/...=.../15
(4 x 3)/(3 x 3) = 12/9
(4 x 5)/(3 x 5) = 20/15
(4 x 10)/(3 x 10) = 40/30
(4 x 12)/(3 x 12) = 48/36
(4 x 0.3)/(3 x 0.3) = 1.2/0.9
(4 x 5)/(3 x 5) = 20/15
b.36/42=.../28=6/...=2,4/...=.../63=.../77=30/...
(36 x 2/3)/(42 x 2/3) = 24/28
(36 x 1/6)/(42 x 1/6) = 6/7
(36 x 1/15)/(42 x 1/15) = 2.4/2.8
(36 x 1.5)/(42 x 1.5) = 54/63
(36 x 11/6)/(42 x 11/6) = 66/77
(36 x 5/6)/(42 x 5/6) = 30/35
