18 + 31 * 2
14 * 7 − 40
19 * 4 − 56
16 * 1 * 0
28 * (60 : 20)
10 + 35 * 2
84 : (28 : 4)
8 : 8 * 19
18 + 31 * 2 = 80
14 * 7 − 40 = 58
19 * 4 − 56 = 20
16 * 1 * 0 = 0
28 * (60 : 20) = 84
10 + 35 * 2 = 80
84 : (28 : 4) = 12
8 : 8 * 19 = 19
Вычисления:
18 + 31 * 2 = 18 + (30 + 1) * 2 = 18 + 30 * 2 + 1 * 2 = 18 + 60 + 2 = 78 + 2 = 80
14 * 7 − 40 = (10 + 4) * 7 − 40 = 70 + 28 − 40 = 98 − 40 = 58
19 * 4 − 56 = (10 + 9) * 4 − 56 = 10 * 4 + 9 * 4 − 56 = 40 + 36 − 56 = 76 − 56 = 20
16 * 1 * 0 = 16 * 0 = 0
28 * (60 : 20) = 28 * 3 = (20 + 8) * 3 = 20 * 3 + 8 * 3 = 60 + 24 = 84
10 + 35 * 2 = 10 + (30 + 5) * 2 = 10 + 30 * 2 + 5 * 2 = 10 + 60 + 10 = 70 + 10 = 80
84 : (28 : 4) = 84 : 7 = (70 + 14) : 7 = 70 : 7 + 14 : 7 = 10 + 2 = 12
8 : 8 * 19 = 1 * 19 = 19
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