Q: How much is 28 minus 18? A: 
Q: How much is 82 minus 48? A: 
Q: How much is 29 minus 18? A: 
Q: How much is 28 minus 16? A: 
Q: How much is 48 minus 18? A: 
Q: How much is 28 minus 18? A: 
Q: How much is 22 minus 17? A: 
Q: How much is 28 minus 18? A: 