a) 16 : 8 + 6 * 3 = 2 + 18 = 20
б) 72 – (47 – 20) : 3 = 72 – 27 : 3 = 72 – 9 = 63
в) 0 * 2 * 5 + 10 = 0 + 10 = 10
г) 50 : (3 + 7) * 2 = 50 : 10 * 2 = 5 * 2 = 10
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