Sagot :
Bonsoir,
A)
3/2 - 1/3 = 9/6 - 2/6 = 7/6
3/4 + 2/3 = 9/12 + 8/12 = 17/12
=> 7/6 * 12/17
=84/102
=42/ 51
= 14/17
B)
2+ 2/7 * 14/5
= 2+ 28/35
= 2+ 4/5
=10/5 + 4/5
= 14/5
C)
-3/14 - 3* 5/7 +2
= -3/14 - 15/7 +2
= -3/14 - 30/14 = 28/14
= -5/14
D)
7/5 + 8/15 * 3/2 -19/2
= 7/5 +24/ 30 -19/2
= 42/30 + 24/30 - 285/30
= -219/30
= -73/10
A) 2/6 / 5/12
= 2/6 * 12/5
= 24/30
= 12/15.
B) 2 + 2/7 * 14/5
= 2 + 28/35
= 2/35 + 28/35
= 30/35
= 6/7.
C) -3/14 - 3/14 +7/5 + 2/5
= -6/14 + 9/5
= -6*5/14*5 + 9*14/5*14
= -30/70 + 126/70
= 96/70
= 48/35.
D)7/5-19/2 + 8/15 x 3/2
= -12/10 + 24/30
= 12/300
= 6/150
= 3/75
Voici le détail des calculs. Bon courage !
= 2/6 * 12/5
= 24/30
= 12/15.
B) 2 + 2/7 * 14/5
= 2 + 28/35
= 2/35 + 28/35
= 30/35
= 6/7.
C) -3/14 - 3/14 +7/5 + 2/5
= -6/14 + 9/5
= -6*5/14*5 + 9*14/5*14
= -30/70 + 126/70
= 96/70
= 48/35.
D)7/5-19/2 + 8/15 x 3/2
= -12/10 + 24/30
= 12/300
= 6/150
= 3/75
Voici le détail des calculs. Bon courage !