Q: How much is 38 minus 31? A: 
Q: How much is 81 minus 25? A: 
Q: How much is 37 minus 31? A: 
Q: How much is 38 minus 37? A: 
Q: How much is 48 minus 31? A: 
Q: How much is 38 minus 21? A: 
Q: How much is 40 minus 33? A: 
Q: How much is 38 minus 31? A: 