Найди значения выражение 54 + 23 - 11 х 5. 69-(13×7-42). (65-56)×(72-57) .10×6+(120: 6).

1) 54 + 23 - 11 * 5=54+23-55=22
2) 69-(13×7-42)=69-49=20
3) (65-56)×(72-57)=9*15=135
4) 10×6+(120:6)=60+20=80

1. 54 + 23 - 11 * 5 = 18
11 * 5 = 55
54 + 23 = 37
55 - 37 = 18
2. 69 - (13 * 7 - 42) = 20
13 * 7 = 91
91 - 42 = 49
69 - 49 = 20
3. (65 - 56) * (72 - 57) = 135
65 - 56 = 9
72 - 57 = 15
9 * 15 = 135
4. 10 * 6 + (120 : 6) = 80
120 : 6 = 20
10 * 6 =60
60 + 20 = 80