bjr
a =2/3x12 = 2x12 / 3 = 24/3 = 8
b = 8x9/12 = 8x9 / 12 = 72/12 = 6
7/4 = 7x4/4x4 = 28/16
12/8 = 4x3/4x2 = 3/2 = 3x3/2x3 = 9/6
ex 3
1er : 600 x 5/12 = 600x5/12 = 250
2eme : 600 x 30% = 600 x 0,30 = 180
et le dernier ? tu sais
ex 4
28€
remise : 28 x 15% = 28 x 0,15 = 4,2€
=> je paie 28 - 4,2 = 23,80 €
ex 5
matin : 450 x 2/3 = 450x2 / 3 = 300 pains
AM : 2/5 (450 - 300) = 2/5 x 150 = 2x150/5 = 60 pains
tu conclus
