(2 +2 ) : 2- 2 = 4:2 -2 = 2-2= 0
(7:7 +7 ) x2 -15 = (1 +7 ) x2 -15 = 16-15= 1
(25+16+10) :17 +27 = 51 :17 +27 = 3 +27 =30
ex 3 : 9:9+9 =1 +9=10
16-14 :7 = 16 -2 =14
25-14 x 2 =11 x2 =22
4 .22 + 24 + 10 = 56
5. 129 , 137 , 147, 156 , 165 , 174 , 183 , 192