exercice 1) a) 20/15
b)14/21
c)36/9
d)40/6
e)5.6/21
f)8.1/4.5
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exercice 1) a) 20/15
b)14/21
c)36/9
d)40/6
e)5.6/21
f)8.1/4.5
b = 12/21+2/21 = 14/21 = 2/3
c = 31/9 +5/9 = 36/9 = 4
d = 17/6 +23/6 = 40/6 =20/3
tu fais la meme chose pour les 2 autres c est simple
a = 4/3 -1/12 = 16/12-1/12 = 15/12
b = 21/8 -5/16 = 42/16 -5/16 = 37/16
c = 32/35 -4/7 = 32/35 -20/35 = 12/35
d = 9/10+7/5 = 9/10 +14/10 = 23/10
tu fais les 2 autres
a = 7/6 +((8/3-2/3) = 7/6 +(6/3) = 7/6 +12/6 = 19/6
b = (17/4-5/4) -3/4 = 12/4 -3/4 =9/4
c = (5/2-1/4) +(2-7/8) = (10/4-1/4) +(16/8 -7/8) =9/4 +9/8 = 18/8 +9/8 =27/8
je te laisse faire la derniere