Bonjour,
a)4/5 3/5 x 1/2 = 3/5x1/2= 3/10
4/5 + 3/10 = 4x2/5x2 + 3/10 = 8/10 + 3/10 = 11/10
b) -3/4 x(1/5-3/10)
(1/5-3/10) = 1x2/5x2-3/10 = (2/10-3/10) = (-1/10)
Soit : -3/4 x (-1/10) = -3/40
c) 2/3-1/5 : 5/8
1/5 : 5/8 = 1/5 x 8/5= 8/25
2/3-8/25 = 2x25/3x25 - 8x3/25x3 = 50-24/75 = 26/75
Le plus grand résultat est : 11/10
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Bonjour,
a)4/5 3/5 x 1/2 = 3/5x1/2= 3/10
4/5 + 3/10 = 4x2/5x2 + 3/10 = 8/10 + 3/10 = 11/10
b) -3/4 x(1/5-3/10)
(1/5-3/10) = 1x2/5x2-3/10 = (2/10-3/10) = (-1/10)
Soit : -3/4 x (-1/10) = -3/40
c) 2/3-1/5 : 5/8
1/5 : 5/8 = 1/5 x 8/5= 8/25
2/3-8/25 = 2x25/3x25 - 8x3/25x3 = 50-24/75 = 26/75
Le plus grand résultat est : 11/10