Bonjour
Calcule et donne le résultat sous la forme d'une fraction la plus simple possible
1) -24/21 ÷ -32/14
= - 24/21 x - 14/32
= 336/672
= (336 x 1) / (336 x 2)
= 1/2
2) 45/-18 ÷ 15/12
= - 45/18 x 12/15
= - 540/270
= (270 x - 2) / (270 x 1)
= - 2
3) -17/27 ÷ -34/-21
= - 17/27 x 21/34
= - 357/918
= (51 x - 7) / (51 x 18)
= - 7/18
4) 39/-42 ÷ -26/56
= - 39/42 x - 56/26
= 2184/1092
= (1092 x 2) / (1092 x 1)
= 2.
