Q: How much is 50 minus 45? A: 
Q: How much is 87 minus 82? A: 
Q: How much is 57 minus 45? A: 
Q: How much is 50 minus 40? A: 
Q: How much is 70 minus 45? A: 
Q: How much is 50 minus 15? A: 
Q: How much is 56 minus 41? A: 
Q: How much is 50 minus 45? A: 