Q: What is 68 minus 18? A: 
Q: What is 78 minus 10? A: 
Q: What is 69 minus 18? A: 
Q: What is 68 minus 15? A: 
Q: What is 68 minus 18? A: 
Q: What is 68 minus 18? A: 
Q: What is 60 minus 12? A: 
Q: What is 68 minus 18? A: 