1) 170 + 170 = 340 < 400 - 70 = 330. 340 > 330
2) 36 - 3 = 33 < 120 : 2 = 60. 33 < 60
3) 84 : 6 = 14 > 98 : 7 = 14. 14 = 14
4) 200 - 85 = 115 < 25 + 80 = 105. 115 > 105