Répondre :
- 7 - 0,4/0,02
= - 7 - 20
= - 27
1 - 10/9 + 0,3/1,2
= 9/9 - 10/9 + 0,25
= - 1/9 + 2,25/9
= - 100/900 + 225/900
= 125/900
= 5/36
Opposé de A = 27
Inverse de A = - 1/27
Opposé de B = - 5/36
Inverse de B = 36/5
= - 7 - 20
= - 27
1 - 10/9 + 0,3/1,2
= 9/9 - 10/9 + 0,25
= - 1/9 + 2,25/9
= - 100/900 + 225/900
= 125/900
= 5/36
Opposé de A = 27
Inverse de A = - 1/27
Opposé de B = - 5/36
Inverse de B = 36/5