Вычисли и выполни проверку.
18 + 75
85 − 36
52 : 4
42 : 3
16 * 4
28 * 3
56 : 2
19 * 3
42 : 14
60 : 12
18 + 75 = 93
Проверка:
93 − 75 = 18
85 − 36 = 49
Проверка:
49 + 36 = 85
52 : 4 = (40 + 12) : 4 = 40 : 4 + 12 : 4 = 10 + 3 = 13
Проверка:
13 * 4 = (10 + 3) * 4 = 10 * 4 + 3 * 4 = 40 + 12 = 52
42 : 3 = (30 + 12) : 3 = 30 : 3 + 12 : 3 = 10 + 4 = 14
Проверка:
14 * 3 = (10 + 4) * 3 = 10 * 3 + 4 * 3 = 30 + 12 = 42
16 * 4 = (10 + 6) * 4 = 10 * 4 + 6 * 4 = 40 + 24 = 64
Проверка:
64 : 4 = (40 + 24) : 4 = 40 : 4 + 24 : 4 = 10 + 6 = 16
28 * 3 = (20 + 8) * 3 = 20 * 3 + 8 * 3 = 60 + 24 = 84
Проверка:
84 : 3 = (60 + 24) : 3 = 60 : 3 + 24 : 3 = 20 + 8 = 28
56 : 2 = (40 + 16) : 2 = 40 : 2 + 16 : 2 = 20 + 8 = 28
Проверка:
28 * 2 = (20 + 8) * 2 = 20 * 2 + 8 * 2 = 40 + 16 = 56
19 * 3 = (10 + 9) * 3 = 10 * 3 + 9 * 3 = 30 + 27 = 57
Проверка:
57 : 3 = (30 + 27) : 3 = 30 : 3 + 27 : 3 = 10 + 9 = 19
42 : 14 = 3
Проверка:
3 * 14 = 3 * (10 + 4) = 3 * 10 + 3 * 4 = 30 + 12 = 42
60 : 12 = 5
Проверка:
5 * 12 = 5 * (10 + 2) = 5 * 10 + 5 * 2 = 50 + 10 = 60