Sagot :
Réponse :
bonjour
j. 1/5 - 2/3 = 3/15 - 10/15 = - 7/15
k. 1/12 - 1/9 = 3/36 - 4/36 = - 1 /36
i. 4/18 + 5/27 = 12/54 + 10/54 = 22/54 = 11/ 27
m. - 17/24 - 5/36 = - 51/72 - 10/72 = - 61/72
n. 3/16 + 1/12 = 9/48 + 4/48 = 13/48
o. - 8/17 + 1/15 = - 120/255 + 17/255 = - 103/255
a. 42/75 + 22/30 = 84/150 + 110/150 = 194/150 = 97/75
b. 85/4 - 25/5 = 425/25 - 100/25 = 325/25 = 13
c. - 12/25 - 8 = - 12/25 - 200/25 = - 212/25
d. - 14/27 - 5/108 = - 56/108 - 5/108 = - 61/108
e. - 9/55 + 7/44 = - 36/220 + 35/220 = - 1/220
f. - 9 /-18 - 5/30 - 9/6 = 1/2 - 1/6 - 3/2 = 6/12 - 2/12 - 18/12 = - 14/12 = - 7/6
Explications étape par étape
Réponse :
bonjour
calcul et simplifie
1/5+(-23)=1/5-2/3=3/15-10/15=-7/15
1/12-1/9=3/36-4/36=-1/36
4/18+5/27=12/54+10/54=22/54=11/27
17/-24+(-5/36)=-102/144-20/144=-122/144=-61/72
3/16-(-1/12)=9/48+4/48=13/48
8/-17-(-1/18)=-144/306+17/306=-127/306
42/75-(-22/30)=84/150+110/150=194/150=97/75
85/4+25/-5=425/20-100/20=325/20=65/4
-12/25-8=-12/25-200/25=-212/25
-14/27+(-5/108)=-56/108-5/108=-61/108
9/-55-(-7/44)=-36/220+35/220=-1/220
-9/-18-5/30+(-9/6)=45/90-15/90-135/90=-105/90=-7/6
Explications étape par étape