Bonjour,
a = 5/24
et b = - (35/18).
Tu donneras les résultats sous forme de fraction irréductibles.
1) Calculer a/b
(5/24) / (-35/18)
= 5/24 * -18/35
= -90/840
= -9/84
= - 3/28
et a x b
5/24 * -35/18
= -175/432
=
. 2) Calculer a + b
5/24 - 35/18
= 5/24*18/18 -35/18*24/24
= 90/432 - 840/432
= - 750/432
= - 375/216
= - 126/72
= - 63/36
= -21/12
= - 7/4
et a -b.
5/24 + 35/18
= 90/432+ 840/32
= 930/432
= 155/72