Sagot :
Bonsoir,
4/5 + 8 =
même dénominateur
4/5 + 8/1 = 4/5 + 40/5 = 44/5
on décompose:
44/5 = 5/5+5/5+5/5+5/5+5/5 +5/5+5/5 +5/5 = 40/5 = 8
5/5 = 1
44/5 - 40/5 = 4/5
et il reste 4/5
=> 4/5 + 8 = 8 + 4/5
Salut ,
4/5 + 8 = 4/5 + (8*5)/(1*5) = 4/5 + 40/5 = 44/5
Ducoup
44/5 = 40/5 + 4/5
On sait que 40/5 = (5*8)/5 = 8
Bonne soirée