Tabla del 2
Cada fila representa grupos de dos elementos. Para completar la tabla, se agregan dos elementos en cada paso:
| De forma concreta | Simbólica |
|---|---|
| \bullet\ \bullet | 2 \times 1 = 2 |
| \bullet\ \bullet + \bullet\ \bullet | 2 \times 2 = 4 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 3 = 6 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 4 = 8 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 5 = 10 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 6 = 12 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 7 = 14 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 8 = 16 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 9 = 18 |
| \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet + \bullet\ \bullet | 2 \times 10 = 20 |








