Sagot :
A= 13/25 - 2/5
= 13/25 - 10/25
= 3/25
B= -31/18 - 4/3
= -31/18 - 24/18
= -55/18
C= 1 - 5/42
= 1/1 - 5/42
= 42/42 - 5/42
= 37/42
= 13/25 - 10/25
= 3/25
B= -31/18 - 4/3
= -31/18 - 24/18
= -55/18
C= 1 - 5/42
= 1/1 - 5/42
= 42/42 - 5/42
= 37/42
Hey, tout d’abord pour les soustraire il faut le même dénominateur
A = 13/25 - 2x5/5x5
A = 13/25 - 10/25
A = 3/25
B = 31/18 - 4x6/3x6
B = 31/18 - 24/18
B = 7/18
C = 42/42 - 5/42
C = 37/42
Voila voila
A = 13/25 - 2x5/5x5
A = 13/25 - 10/25
A = 3/25
B = 31/18 - 4x6/3x6
B = 31/18 - 24/18
B = 7/18
C = 42/42 - 5/42
C = 37/42
Voila voila