42 + 7 = 49
35 + 4 = 39
17 + 20 = 37
27 − 20 = 7
15 − 4 = 11
28 − 4 = 24
10 + 20 = 30
50 − 10 = 40
30 − 20 = 10
46 + 3 = 49
16 + 30 = 46
18 − 6 = 12
Вычисления:
42 + 7 = 49
35 + 4 = 39
17 + 20 = 37
27 − 20 = 7
15 − 4 = 11
28 − 4 = 24
10 + 20 = 30
50 − 10 = 40
30 − 20 = 10
46 + 3 = 49
16 + 30 = 46
18 − 6 = 12