(39-67)+45
(45-67)+39
(-67+39)+45
1) (39+45)-67
1. 39+45 = 84
84 - 67 = 17
2) 67- 45 = 22
39- 22 = 17
3) 67-39 = 28
45-28 = 17
(39-67)+45
(45-67)+39
(-67+39)+45
1) (39+45)-67
1. 39+45 = 84
84 - 67 = 17
2) 67- 45 = 22
39- 22 = 17
3) 67-39 = 28
45-28 = 17