Activité 4 – Différence de deux nombres entiers

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
= – 5

– 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