Q: How much is 49 minus 39? A: 
Q: How much is 36 minus 28? A: 
Q: How much is 49 minus 39? A: 
Q: How much is 49 minus 32? A: 
Q: How much is 69 minus 39? A: 
Q: How much is 49 minus 19? A: 
Q: How much is 42 minus 33? A: 
Q: How much is 49 minus 39? A: 