170-90 220-70 340-80 140-60 210-40

Here are the results of the subtractions:

• 170 − 90 = 80
• 220 − 70 = 150
• 340 − 80 = 260
• 140 − 60 = 80
• 210 − 40 = 170

If you meant something different (e.g., a pattern, units, or a different operation), tell me and I’ll adjust.