⊳ Exercice 1 ⊳ Exercice 2 ⊳ Exercice 3 ⊳ Exercice 4

2 2
.
.
a
ba b b
.
N Z D Q R
−13
28
7
√2
3,58
7
3
.
√251 '15 √251
980 = 2 ×490
980 = 2 ×2×245
980 = 22×5×49
980 = 22×5×72