Activité 5 – Propriétés de l'addition

d) Complète par = ou "différent" (<>).

3 + 16
19
=
16 + 3
19
– 4 – 9
– 13
=
– 9 – 4
– 13
a – b
ex.: 7 – 9
– 2
<>
b – a
9 – 7
2
3 – 16
– 13
<>
– 16 – 3
– 19
– 4 + 9
5
=
9 – 4
5
a – b
ex.: 7 – 9
– 2
<>
a + b
9 – 7
2
– 3 – 16
– 19
=
– 16 – 3
– 19
4 + 9
13
=
9 + 4
13
a – b
ex.: 7 – 9
– 2
=
– b + a
– 9 + 7
– 2
– 3 + 16
13
=
16 – 3
13
– 9 + 4
– 5
=
4 – 9
– 5
a – b
ex.: 7 – 9
– 2
<>
– a + b
– 7 + 9
2