Q: What is 58 minus 57? A: 
Q: What is 39 minus 19? A: 
Q: What is 58 minus 57? A: 
Q: What is 58 minus 52? A: 
Q: What is 78 minus 57? A: 
Q: What is 58 minus 17? A: 
Q: What is 60 minus 59? A: 
Q: What is 58 minus 57? A: 