12 + (24 - 9) = 12 + 15
= 27
23 - 4 x 2 = 23 - 8
= 15
(156 + 23) x 3 = 179 x 3
= 537
88 + 44 : 2 = 88 + 22
= 110
205 - 174 : 3 = 205 - 58
= 147
12 + (24 - 9) = 12 + 15
= 27
23 - 4 x 2 = 23 - 8
= 15
(156 + 23) x 3 = 179 x 3
= 537
88 + 44 : 2 = 88 + 22
= 110
205 - 174 : 3 = 205 - 58
= 147