Question

6. Calculaţi folosind factorul comun:
a) 14 ∙ 2 + 14 ∙ 21 – 14 ∙ 3 =
b) 516 ∙ 18 + 516 ∙ 89 – 516 – 516 ∙ 6 =
c) 2 13 ∙ 45 – 2 13 ∙ 23 + 2 13 – 2 13 ∙ 7 =
d) 5 20 + 5 21 + 5 22 =
Repede va rog

Answer 1

Răspuns:

a)14 (2+21-3)

14(24-3)

14× 21=294

b)516(18+89-6)

516× 101=52.116

c)213(45-2-7)

213×33=7.029