Q: How much is 27 minus 18? A: 
Q: How much is 64 minus 45? A: 
Q: How much is 29 minus 18? A: 
Q: How much is 27 minus 14? A: 
Q: How much is 27 minus 18? A: 
Q: How much is 27 minus 18? A: 
Q: How much is 29 minus 10? A: 
Q: How much is 27 minus 18? A: 