4. Найди удобный вычисления для каждого выражения. (8 + 2)*50 4* (30 - 20) (8*2)*5 (2*5*)7 (600 + 300):3 (2*32)*5 (40 - 30). 5 20* (10 + 40) (50 + 6):8

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

Пошаговое объяснение:

1) (8+2) * 50 = 10 * 50 = 500

2) 4 * (30-20) = 4 * 10 =40

3) (8*2) * 5 = 8 * (2*5) = 8 * 10 = 80

4) (2 * 5) * 7 = 10 * 7 = 70

5) (600 + 300) : 3 = 900 : 3 = 300

6) (2 * 32) * 5 = (2*5) * 32 = 10 * 32 = 320

7) (40-30) * 5 = 10 * 5 = 50

8) 20 * (10+40) = 20 * 50 = 1000

9) (50+6) : 8 = 56 : 8 = 7