Bonjour,
-7+4 = - ( 7 - 4 ) = - 3
-3+7 = 7 - 3 = 4
(-4) + (-5) = - ( 4 + 5 ) = - 9
-3+10 = - ( 3 - 10 ) = - (-7) = +7
3-11 = - ( -3 + 11 ) = - ( 11 - 3 ) = - 8
1 + 3*7 - 10 = 1 - 10 + 3*7 = - ( 10 - 1 ) + 3*7 = -9 + 3*7 = -9 + 21 = 21 - 9 = 12
-8+9 = 9 - 8 = 1
4-3-8 = 4 - ( 3 + 8 ) = 4 - 11 = - ( 11 - 4 ) = - 7
2 *(7.5-5) = 2*2.5=5 ou 2*7.5 - 2*5 = 15 - 10 = 5
-12+16 = 16 - 12 = 4
6-9 = - ( 9-6 ) = -3
-2+(-7) = -2 -7 = - ( 2 + 7 ) = - 9
-4+(7-3) = -4 + 4 = 0
le quart de 8 = 1/4 * 8 = 8 / 4 = 2
5+(-1)+(-13) = 5 - ( 1 + 13 ) = 5 - 14 = - ( 14 - 5 ) = - 9
2*(9-3) = 2 * 6 = 12 ou 2*9 - 2*3 = 18 - 6 = 12
-15+7 = - ( 15 - 7 ) = - 8
J'espère que c'est bien ce qui est attendu. Bonne journée
