Tables d'addition
- Tables d'addition
-
Table d'addition
Une table d'addition permet de connaître le résultat de l'addition de petits nombres entiers.
La table usuelle
La table d'addition la plus connue est celle des entiers allant jusqu'à 10 dans la base décimale. La table d'addition usuelle est la suivante.
| + |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| 0 |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| 1 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
| 2 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
| 3 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
| 4 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
| 5 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
| 6 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
| 7 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
| 8 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
| 9 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
| 10 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
Pour connaître la somme 5 + 7, prendre le nombre à l'intersection de la colonne 5 et de la ligne 7. Le résultat lu sera 12.
Le nombre d'une case est égal à l'incrément (ajout de un) de la case immédiatement à gauche ou au-dessus.
Propriétés
La table présente une symétrie par rapport à une diagonale. Cette symétrie reflète le caractère commutatif de l'addition : a + b = b + a
Sujets connexes
Portail des mathématiques
Catégories : Arithmétique élémentaire | Calcul manuel | Calcul mental | Mathématiques élémentaires
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Contenu soumis à la licence CC-BY-SA. Source : Article Tables d'addition de Wikipédia en français (auteurs)
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