Bonjour,
1)1,92/0,8
= (1,92 x 100) / (0,8 x 100)
= 192/80
= (16 x 12) / (16 x 5)
= 12/5
2)14,4/0,4
= (14,4 x 10) / (0,4 x 10)
= 144/4
= (4 x 36) / (4 x 1)
= 36
3)9/0,1
= (9 x 10) / (0,1 x 10)
= 90/1
= 90
4)3,575/11
= (3,575 x 1 000) / (11 x 1 000)
= 3 575/11 000
= (275 x 13) / (275 x 10)
= 13/40
5)7,8/1,2
= (7,8 x 10) / (1,2 x 10)
= 78/12
= (6 x 13) / (6 x 2)
= 13/2
6)16,05/2,5
= (16,05 x 100) / (2,5 x 100)
= 1 605/250
= (5 x 321) / (5 x 50)
= 321/50
7)7/0,5
= (7 x 10) / (0,5 x 10)
= 70/5
= (5 x 14) / (5 x 1)
= 14.
