Bonjour :)
Lignes en italique : lignes intermédiaires
k= 9 - 15/2 - 3/2
k= 9 - (15-3)/2
k= 9/1 - 12/2
k= (9×2)/(1×2) - 12/2
k=18/2 -12/2
k= (18-12)/2
k= (18-12)/2 k= 6/2
k= (18-12)/2 k= 6/2 k= 3/1
k= 3
L= 1-5/8+3/8
L= -4/8 + 3/8
L= (-4+3)/8
L= -1/8
N=(1/10 + 1/30) - (1/5-1/15)
N=((1×3)/(10×3) + 1/30) - ((1×3)/(5×3) -1/15)
N= (3/30 + 1/30) + (3/15 - 1/15)
N= ((3+1)/30) + ((3-1)/15)
N=4/30 + 2/15
N= 4/30 + (2×2)/(15×2)
N= 4/30 + 4/30
N= 8/30
N= 4/15
P= 11/7 + 7/49 + 6/21
P= 11/7 + (7÷7)/(49÷7) + (6÷3)/(21÷3)
P= 11/7 + 1/7 + 2/7
P= (11+1+2)/7
P= 14/7
P= 2/1
P= 2
J'espère t'avoir aidé ;)
