Bonsoir vous pouvez m’aider svp.merci

Bonsoir

a/

A= -5/24 + 1/3
A= -5/24 + (1×8)/(3×8)
A= -5/24 + 8/24
A= -5+8/24
A= 3/24 = (3÷3)/(24÷3) = 1/8

b/
●A ton avis réfléchie un peu ....

●
B= 1 - 5/4
B= 1/1 -5/4
B= (1×4)/(1×4) -5/4
B= 4/4-5/4
B= 4-5/4
B= -1/4

c/

● -3= -3/1 = -3×8/1×8 = -24/8
●
A toi de faire ......


Voilà ^^

A.
(-5/24)+(1/3) 
= (-5/24)+(8/24)
= (-5+8)/24
= 3/24

B. Il faut 4 quarts car 4/4 = 1
1 - (5/4)
= (4/4) - (5/4)
= (4-5)/4
= -1/4

C.
-3
= -3/1 
= (-3 x 8) / (1 x 8)
= -24 / 8

-3 + (5/-8)
= -24/8 + (5x-1 / -8x-1)
= -24/8 + (-5/8)
= ( -24 + (-5) ) / 8
= -29 / 8