Sagot :
Bonsoir
7/6-1/2*3/5
= 7/6 - 3/10
= (7 x 5) / (6 x 5) - (3 x 3) / (10 x 3)
= 35/30 - 9/30
= 26/30
= (2 x 13) / (2 x 15)
= 13/15
1/6+1/4:-5/4
= 1/6 + 1/4 x - 4/5
= 1/6 - 4/20
= (1 x 10) / (6 x 10) - (4 x 3) / (20 x 3)
= 10/60 - 12/60
= - 2/60
= (2 x - 1) / (2 x 30)
= - 1/30
Pas du tout !
Bonjour,
7/6-1/2*3/5=7/6-3/10=35/30-9/30=26/30=13/15
1/(13/15)=15/13
1/6+1/4:(-5/4)=1/6+1/4*(-4/5)=1/6+(-4/20)=1/6-1/5=5/30-6/30=-1/30
-1/30≠15/13
6-1/2*3/5 n’est pas l'inverse de 1/6+1/4:-5/4.