Q: How much is 30 minus 18? A: 
Q: How much is 56 minus 27? A: 
Q: How much is 39 minus 18? A: 
Q: How much is 30 minus 10? A: 
Q: How much is 60 minus 18? A: 
Q: How much is 30 minus 28? A: 
Q: How much is 34 minus 12? A: 
Q: How much is 30 minus 18? A: 