Question

Transforma fiecare din exercitiile urmatoare in exercitii de inmultire a unui factor cu o suma/diferenta:
2 + 6 × 3 + 6 × 5 =?
8 × 9 - 8 × 5 - 8 × 2 =?
3 × 7 + 4 × 7 + 2 × 7 =?
8 × 5 - 3 × 5 - 2 × 5 =?
6 × 9 - 2 × 9 + 3 ×9 =?

Answer 1

2 + 6 * 3 + 6 * 5 =  2 * (9 + 15)

8 * 9 - 8 * 5 - 8 * 2 = 8 * (9 - 5 - 2)

3 * 7 + 4 * 7 + 2 * 7 = 7 * (3 + 4 + 2)

8 * 5 - 3 * 5 - 2 * 5 = 5 * (8 - 3 - 2)

6 * 9 - 2 * 9 + 3 * 9 = 9 * (6 - 2 + 3)