(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
(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