h) | Calcule la valeur numérique des expressions suivantes si a = 2 ; b = – 5 ; c = 7 et d = – 3 |
b
+ c |
= – 5 + 7 = 2 |
–
a + c |
=
– 2 + 7 = 5 |
a
– c |
=
2 – 7 |
–
d + c |
=
– (– 3 ) + 7 = 3 + 7 = 10 |
b
+ d |
=
– 5 + (– 3) = – 8 |
–
c – d |
=
– 7 – (– 3) = – 7 + 3 = – 4 |
b
– d |
=
– 5 – (– 3) = – 5 + 3 = – 2 |
–
b – c |
=
– (– 5) – 7 = 5 – 7 = – 2 |
c
– b |
=
7 – (– 5) = 7 + 5 = 12 |
b
– a |
= – 5 – 2 = – 7 |