Q: How much is 51 minus 22? A: 
Q: How much is 65 minus 64? A: 
Q: How much is 56 minus 22? A: 
Q: How much is 51 minus 20? A: 
Q: How much is 41 minus 22? A: 
Q: How much is 51 minus 42? A: 
Q: How much is 59 minus 20? A: 
Q: How much is 51 minus 22? A: 