Explications étape par étape:
60/42
=(22 × 3 × 5)/(2 × 3 × 7)
=((22 × 3 × 5) : (2 × 3)) / ((2 × 3 × 7) : (2 × 3))
=(2 × 5)/7
=10/7
84/70
=(22 × 3 × 7)/(2 × 5 × 7)
=((22 × 3 × 7) ÷ (2 × 7)) / ((2 × 5 × 7) ÷ (2 × 7))
=(2 × 3)/5
=6/5
70/84 =
(2 × 5 × 7)/(22 × 3 × 7) =
((2 × 5 × 7) : (2 × 7)) / ((22 × 3 × 7) : (2 × 7)) =
5/(2 × 3) =
5/6
42/60
=(2 × 3 × 7)/(22 × 3 × 5)
=((2 × 3 × 7) : (2 × 3)) / ((22 × 3 × 5) : (2 × 3))
=7/(2 × 5)
=7/10
