Question

Найди удобный способ вычисления для каждого выражения.
(8+2)*50 =
4*(30-20) =
(8*2) * 5 =
(2*5)*7 =
(600+300): 3 =
20*(10+40) =
(50+6): 8=

Answer 1

(8 + 2) * 50 = 10 * 50 = 500

4 * (30 - 20) = 4 * 10 = 40

(8 * 2) * 5 = 8 * (2 * 5) = 8 * 10 = 80

(2 * 5) * 7 = 10 * 7 = 70

(600 + 300) : 3 = 900 : 3 = 300

20 * (10 + 40) = 20 * 50 = 1000

(50 + 6) : 8 = 56 : 8 = 7