Какое свойство помогает вычислить рационально?

Question

Вопрос:

Какое свойство помогает вычислить рационально?

Ответ:

ФИО:Телефон:Емаил:Полное описание сути нарушения прав (почему распространение данной информации запрещено Правообладателем):

Accepted Answer

Краткое пояснение: Рациональное вычисление основывается на свойствах умножения, таких как сочетательное и переместительное, позволяющих группировать числа удобным способом для упрощения вычислений.

(190 ⋅ 5) ⋅ 2 = 190 ⋅ (5 ⋅ 2) = 190 ⋅ 10 = 1900
5 ⋅ (630 ⋅ 4) = 5 ⋅ (4 ⋅ 630) = (5 ⋅ 4) ⋅ 630 = 20 ⋅ 630 = 12600
(639 ⋅ 4) ⋅ 5 = 639 ⋅ (4 ⋅ 5) = 639 ⋅ 20 = 12780
(7250 ⋅ 2) ⋅ 5 = 7250 ⋅ (2 ⋅ 5) = 7250 ⋅ 10 = 72500
(332 ⋅ 4) ⋅ 5 = 332 ⋅ (4 ⋅ 5) = 332 ⋅ 20 = 6640
200 ⋅ (96 ⋅ 5) = 200 ⋅ (5 ⋅ 96) = (200 ⋅ 5) ⋅ 96 = 1000 ⋅ 96 = 96000
(103 ⋅ 50) ⋅ 4 = (50 ⋅ 103) ⋅ 4 = 50 ⋅ (103 ⋅ 4) = 50 ⋅ 412 = 20600
(625 ⋅ 200) ⋅ 5 = 625 ⋅ (200 ⋅ 5) = 625 ⋅ 1000 = 625000