Q: How much is 48 minus 39? A: 
Q: How much is 69 minus 18? A: 
Q: How much is 49 minus 39? A: 
Q: How much is 48 minus 30? A: 
Q: How much is 48 minus 39? A: 
Q: How much is 48 minus 39? A: 
Q: How much is 49 minus 30? A: 
Q: How much is 48 minus 39? A: 