Q: How much is 71 minus 51? A: 
Q: How much is 69 minus 22? A: 
Q: How much is 77 minus 51? A: 
Q: How much is 71 minus 50? A: 
Q: How much is 71 minus 51? A: 
Q: How much is 71 minus 21? A: 
Q: How much is 74 minus 58? A: 
Q: How much is 71 minus 51? A: 