35+14-26 54-12+28. 47-21+63. 80- 43-17
1.=23 2.=70 3.=89 4.=20
35+14-26 = 49 - 26 = 24 54-12+28 = 42 + 28 = 70 47-21+63 = 26 + 63 = 89 80-43-17 = 37 - 17 = 20