Répondre :
45 x 49 / 14 x 60 = 9 x 7 / 2 x 12 = 63 / 24 = 21/8
45 x 65 / 26 x 72 = 2925 / 1872 = 25/16
12.4 : 48 = 0.2583333..
0.55 x 2 = 1.1/11 = 0.1
2.5 x 3 / 3 x 0.5 = 7.5 / 1.5 = 5
5.6 x 9 = 50.4 /0.7 = 72
a)45 x 49 / 14 x 60
= 9 x 7 / 2 x 12
= 63 / 24
= 21/8
b)45 x 65 / 26 x 72
= 2925 / 1872
= 25/16
c)12.4 : 48
= 0.2583333..
d)0.55 x 2 =
1.1/11
= 0.1
e)2.5 x 3 / 3 x 0.5
= 7.5 / 1.5
= 5
f)5.6 x 9 =
50.4 /0.7
= 72
en éspèrant t'avoir aidé:)