calculez A,B,C et donnez les réponses sous forme de fraction urréductible A =5/3 +3/5 X 25/6 B=(21/13) diviser (49/26) C=15/10 au cube) diviser (5 x10 au carré

A = 5/3 + 3/5 x 25/6
A = 5/3 + 75/6
A = 5 x 2 / 3 x 2 + 75/6
A = 10/6 + 75/6
A = 85/6

B = (21/13) : (49/26)
B = 21/13 x 26/49
B = 546/637
B = 91 x 6 / 91 x 7
B = 6/7

C = 15/10³ : (5 x 10²)
C = 15/10³ x (100 x 5)
C = 15/1000 x 500
C = 7500/1000
C = 500 x 15/ 500 x 2
C = 15/2

A= 5/3 + 3/5 x 25/6
A= 5/3 + 75/30
A= 50/30 + 75/30
A= 125/30
A= 25/6          (simplification par 5)

B= 21/13 : 49/26
B= 21/13 x 26/49
B= 546/637
B= 6/7             (simplification par 91)

C= (15/10)³ : (5 x 10²)
C= 3375/1000 : (5 x 100)
C= 27/8 : 500
C= 27/8 x 1/500
C= 27/4000