Задание 6. Вычислите удобным способом, применяя свойства умножения: a) 125 (378.8); б) (807.20).50 в) 40 * 63.250.

a) 125 ⋅ (378 ⋅ 8) = (125 ⋅ 8) ⋅ 378 = 1000 ⋅ 378 = 378000

б) (807 ⋅ 20) ⋅ 50 = 807 ⋅ (20 ⋅ 50) = 807 ⋅ 1000 = 807000

в) 40 ⋅ 63 ⋅ 250 = 63 ⋅ (40 ⋅ 250) = 63 ⋅ 10000 = 630000

Ответ: a) 378000; б) 807000; в) 630000