aider moi svp c'est le 38 et le 39 math niv 6ème​

Bonjour,

48 × 3/8 = (48×3)/8 = (6×8×3)/8 = 6×3 = 18

6/7 × 49 = (6×49)/7 = (6×7×7)/7 = 6×7 = 42

4/10 × 100 = (4×100)/10 = (4×10×10)/10 = 4×10 = 40

12 × 2/24 = (12×2)/24 = 24/24 = 1

35 × 12/30 = (35×12)/30 = (7×5×6×2)/(6×5) = 7×2 = 14

9/54 × 12 = (9×12)/54 = (9×6×2)/(9×6) = 2

6 × 16/12 = (6×16)/12 = (2×3×4×4)/(3×4) = 2×4 = 8

7/14 × 2 = (7×2)/14 = 14/14 = 1

2,3 × 9/3 = 2,3 × 3 = 6,9

les 4/6 de 42 = 4/6 × 42 = (4×42)/6 = (4×6×7)/6 = 4×7 = 28

le triple de 7/6 = 3 × 7/6 = (3×7)/6 = (3×7)/(3×2) = 7/2 = 3,5

5 × 7/15 × 3 = (5×7×3)/15 = (15×7)/15 = 7

Bonsoir,

N° 38

a) 48x3/8= 6/1x3/1= 6x3= 18

b) 6/7x49= 6/1x7/1= 6x7= 42

c) 4/10x100= 4/1x10/1= 40

d) 12/1x2/24= 1/1x2/2= 2/2= 1

e) 35x12/30= tu fais pareil

N° 39

a) 1x 16/2= 16/2= 8

b) 7/14x2= 14/14= 1

c) 2.3x9/3= 2.3x3= 6.9

d) 42x4/6= 4/1x 7/1= 28

e)  3x7/6= 1/1x7/2=7/2= 3.5

f) ( 5)x7/15x (3)= 5/1x7/5x1/1= 35/5= 7