Bonjour pouvez vous m’aider svp ! A=4/5+3/10. B=7/10+3/100. C=2/21+8/7. D=5/3-20/30 E=3/8+5/16. F=34/63-2/9 G=4+3/7 . H=48/25-1 I=8/9-3/4

Réponse :

A=4/5+3/10=(4*2)/(5*2) + 3/10 = 8/10 + 3/10 = 11/10

B=7/10+3/100= (7*10)/(10*10) + 3/100 = 70/100 + 3/100 = 73/100

C=2/21+8/7= 2/21 + (8*3)/(7*3) = 2/21 + 24/21 = 26/21

D=5/3-20/30= (5*10)/'3*10) - 20/30 = 50/30 - 20/30 = 30/30 = 1

E=3/8+5/16= (3*2)/(8*2) + 5/16 = 6/16 + 5/16 = 11/16

F=34/63-2/9= 34/63 - (2*7)/(9*7) = 34/63 - 14/63 = 20/63

G=4+3/7= (4*7)/(1*7) + 3/7 = 28/7 + 3/7 = 31/7

H=48/25-1= 48/25 - (1*25)/(1*25) = 48/25 - 25/25 = 23/25

I=8/9-3/4= (8*4)/(9*4) - (3*9)/(4*9) = 32/36 - 27/36 = 5/36

Explications étape par étape