1) (45 + 27) : 3 - 12 = 72 : 3 - 12 = 24 - 12 = 122) 100 - (10 • 9) - 8 = 100 - 90 - 8 = 10 - 8 = 23) 90 - (36 : 3) • 2 = 90 - 12 • 2 = 90 - 24 = 664) 17 + (15 • 3) • 0 = 17 + 45 • 0 = 17 + 0 = 175) 84 : 4 • 3 + 2 = 21 • 3 + 2 = 63 + 2 = 656) 5 • 5 + 75 : 5 = 25 + 75 : 5 = 25 + 15 = 407) 17 • 3 + 2 • 10 = 51 + 20 = 718) 80 - (5 • 2) : 10 = 80 - 10 : 10 = 80 - 1 = 799) 72 : 6 + 6 • 5 = 12 + 30 = 42
1) (45 + 27) : 3 - 12 = 72 : 3 - 12 = 24 - 12 = 12
2) 100 - (10 • 9) - 8 = 100 - 90 - 8 = 10 - 8 = 2
3) 90 - (36 : 3) • 2 = 90 - 12 • 2 = 90 - 24 = 66
4) 17 + (15 • 3) • 0 = 17 + 45 • 0 = 17 + 0 = 17
5) 84 : 4 • 3 + 2 = 21 • 3 + 2 = 63 + 2 = 65
6) 5 • 5 + 75 : 5 = 25 + 75 : 5 = 25 + 15 = 40
7) 17 • 3 + 2 • 10 = 51 + 20 = 71
8) 80 - (5 • 2) : 10 = 80 - 10 : 10 = 80 - 1 = 79
9) 72 : 6 + 6 • 5 = 12 + 30 = 42