Q: How much is 81 minus 39? A: 
Q: How much is 85 minus 62? A: 
Q: How much is 89 minus 39? A: 
Q: How much is 81 minus 30? A: 
Q: How much is 81 minus 39? A: 
Q: How much is 81 minus 79? A: 
Q: How much is 85 minus 33? A: 
Q: How much is 81 minus 39? A: 