AB = 27 BC = 27/3 = 9cm
P= AB + BC + AC = 61
27 + 9 + x + 61
36 + x = 61
x (AC) = 61 - 36 = 25
AC = 25 cm
Ответ:
1)42:6+54:6=7+9=16
(42+54):6=96:6=16
16=16
2)54:6-42:6=9+7=16
(54-42):6=12:6=2
16>2
3)(63:9)×5=7×5=35
(63×5):9=315:9=35
35=35
4)(65×26):13=1690:13=130
(65:13)×26=5×26=130
(26:13)×65=2×65=130
130=130=130