Q: How much is 80 minus 64? A: 
Q: How much is 91 minus 42? A: 
Q: How much is 85 minus 64? A: 
Q: How much is 80 minus 60? A: 
Q: How much is 70 minus 64? A: 
Q: How much is 80 minus 64? A: 
Q: How much is 89 minus 63? A: 
Q: How much is 80 minus 64? A: 