Bonsoir je ne comprend pas mon exercice qui pourrait m'expliquer svp

Réponse :

Bonsoir

Explications étape par étape

A = 11/37 + 21/37     même dénominateur, tu additionnes les numérateurs

A = 32/37

B = 7/6 -11/30

7/6 X 5/5 -11/30

35/30 -11/30 = 24/30 = 8/10 = 4/5

C = 7 +2/3

7 X 3/3 +2/3

21/3 +2/3 =

23/3

D = 7/8 X 3/5

21/40

E = 2/5 X 4/5

8/25

F = 7 X 6/37

42/37

( 6/5 -2/5) X 3/7

4/5 X 3/7

12/35

6/5 -2/5 X 3/7

6/5 -6/35

6/5 X 7/7 -6/35

42/35 -6/35

36/35

Bonsoir,

a. 11/37 + 21/37

= 32/37

b. 7/6 - 11/30

= (7 x 5) / (6 x 5) - 11/30

= 35/30 - 11/30

= 24/30

= (6 x 4) / (6 x 5)

= 4/5

c. 7 + 2/3

= (7 x 3) / (1 x 3) + 2/3

= 21/3 + 2/3

= 23/3

d. 7/8 x 3/5

= 21/40

e. 2/5 x 4/5

= 6/25

f. 7 x 6/37

= 42/37

g. (6/5 - 2/5) x 3/7

= 4/5 x 3/7

= 12/35

h. 6/5 - 2/5 x 3/7

= 6/5 - 6/35

= (6 x 7) / (5 x 7) - 6/35

= 42/35 - 6/35

= 36/35