Sagot :
bonjour
A = 5 x 2/3 - 1 /3
= 10/3 - 1/3
= 9/3 = 3
B = 7/4 - 3/4 x 3/2
= 7/4 - 9/8
= 14/8 - 9 /8
= 5 /8
C = ( 5/6 + 7/12 ) x 3 /5
= ( 10/12 + 7/12 ) x 3 /5
= 17/12 x 3/5
= 51/60 = 17/20
D = 3/4 x 2/9 + 28/15 x 25/14
= 6/36 + 672 /210
= 1/6 + 16/ 5
= 5/30 + 96/30
= 101/30
Réponse :
Bonjour
Explications étape par étape :
A = 5 X 2/3 - 1/3 = 10/3 -1/3 = 9/3 = 3
B = 7 - 3 X 3 = 7/4 - 9/8 = 7/4 X 2/2 - 9/8 = 14/8 - 9/8 = 5/8
4 4 2
C = (5/6 + 7/12) X 3/5= (5/6 X 2/2 + 7/12) X 3/5
C =( 10/12 + 7/12) X 3/5
C = 17/12 X 3/5 = 51/60 = 17/20
D = 3/4 X 2/9 + 28/15 X 25/14
D = 6/36 + 672/210
D = 1/6 + 16/5
D = 1/6 X 5/5 + 16/5 X 6/6
D = 5/30 + 96/30
D = 101/30