Q: How much is 39 minus 10? A: 
Q: How much is 76 minus 68? A: 
Q: How much is 34 minus 10? A: 
Q: How much is 39 minus 10? A: 
Q: How much is 89 minus 10? A: 
Q: How much is 39 minus 10? A: 
Q: How much is 47 minus 18? A: 
Q: How much is 39 minus 10? A: 