Exercices de maths : Opérations sur les fractions (3e)

Exercice 1
A=
−12
11 −
20
99 ÷
20
33 B=
−5
4÷ 13 8−
−8
5!C=
7
2+ 10
4
3+ 6
Exercice 2
A= 9 +
−1
10 ×
7
5B=
8
3+ 5
−2
3+ 1
C=
5
4÷ −2 9+
5
8!
Exercice 3
A=4
3÷ 1 6−
13
5!B=
4
7−2
−7
8+ 1
C= 9 −
9
10 ×
80
27
Exercice 4
A=
9
4−8
−1
2−2
B=−63 −
−7
5×
3
28 C=
−1
3÷ 1 5+6 7!
Exercice 5
A=
−32
7−
8
21 ×
49
24 B=7
8÷ −7 9−
−11
8!C=
−1
2+ 9
−7
5−5
Exercice 6
A=25
13 −
−2
13 ×
13
5B=
10
7+ 5
−5
9+ 8
C=5
4× 9 2+
−8
3!