Q: How much is 31 minus 27? A: 
Q: How much is 38 minus 33? A: 
Q: How much is 39 minus 27? A: 
Q: How much is 31 minus 20? A: 
Q: How much is 41 minus 27? A: 
Q: How much is 31 minus 17? A: 
Q: How much is 35 minus 21? A: 
Q: How much is 31 minus 27? A: 