Q: What is the result of 39 minus 18? A: 
Q: What is the result of 69 minus 45? A: 
Q: What is the result of 39 minus 18? A: 
Q: What is the result of 39 minus 17? A: 
Q: What is the result of 79 minus 18? A: 
Q: What is the result of 39 minus 28? A: 
Q: What is the result of 40 minus 19? A: 
Q: What is the result of 39 minus 18? A: 