Sagot :
Bonjour ! :)
1) 2 - 1/8 = (2 * 8)/(1 * 8) - 1/8 = 16/8 - 1/8 = 15/8.
2) 2/3 * 3/4 * 4/6 = (2 * 3)/(4 * 3) * 4/6 = 6/12 * 4/6 = (6 * 4)/(12 * 6) = 24/72 = (8 * 3)/(9 * 8) = 3/9.
3) 3 - 3 * 1/2 = 3 - (3 * 1)/(1 * 2) = 3 - 3/2 = ((3 * 2)/(1 * 2) - 3/2 = 6/2 - 3/2 = 3/2.
4) 5/3 - 2/3 * -1 = 5/3 + 2/3 = (5 + 2)/3 = 7/3.
5) 2 - 1/5 : 2 + 1/5 = 2 - 1/5 * 1/2 + 1/5 = 2 - 1/10 + 1/5 = 20/10 - 1/10 + 1/5 = 19/10 + 2/10 = 21/10.
Bonne journée !
Bonjour
1) 2 - 1/8=16/8-1/8=15/8
2) 2/3 x 3/4 x 4/6 =24/72=(24÷8)/(72÷8)=3/9=(3x1)/(3x3)=1/3
3) 3 - 3 x 1/2 =3-3/2=6/2-3/2=3/2
4) 5/3 - 2/3 x (-1) =5/3-(-2)/3=5/3+2/3=7/3
5) 2 - 1/5 ÷ 2 + 1/5
2-1/5x1/2+1/5
2-(1/5x1/2)+1/5
2-1/10+1/5=20/10-1/10+2/10=21/10