84 − 3 = (80 + 4) − 3 = 80 + (4 − 3) = 8 + 1 = 81
43 + 7 − 18 = 50 − 18 = 50 − (10 + 8) = 50 − 10 − 8 = 40 − 8 = 32
72 + (64 − 60) = 72 + 4 = 76
Условие:
84 − 3
43 + 7 − 18
72 + (64 − 60)
84 − 3 = (80 + 4) − 3 = 80 + (4 − 3) = 8 + 1 = 81
43 + 7 − 18 = 50 − 18 = 50 − (10 + 8) = 50 − 10 − 8 = 40 − 8 = 32
72 + (64 − 60) = 72 + 4 = 76