Bonjour,
a)
252/ 9 = 28
189/9 = 21
=> 28/21
28/ 7 = 4
21/7 =3
=> 4/3
b)
(114/19) / ( 171/19)
= 6/ 9
( 6/3) / (9/3)
= 2/3
Réponse :
compléter les pointillés
a) 252/189
= (252 ÷ 9)/(189 ÷ 9)
= 28/21
= (28 ÷ 7)/(21 ÷ 7)
= 4/3
b) 114/171
= (114 ÷ 19)/(171 ÷ 19)
= 6/9
= (6 ÷ 3)/(9 ÷ 3)
= 2/3
Explications étape par étape :