Q: How much is 20 minus 17? A: 
Q: How much is 38 minus 10? A: 
Q: How much is 29 minus 17? A: 
Q: How much is 20 minus 10? A: 
Q: How much is 60 minus 17? A: 
Q: How much is 20 minus 17? A: 
Q: How much is 29 minus 16? A: 
Q: How much is 20 minus 17? A: 