Q: How much is 50 minus 39? A: 
Q: How much is 98 minus 54? A: 
Q: How much is 59 minus 39? A: 
Q: How much is 50 minus 30? A: 
Q: How much is 80 minus 39? A: 
Q: How much is 50 minus 49? A: 
Q: How much is 52 minus 31? A: 
Q: How much is 50 minus 39? A: 