Q: How much is 61 minus 28? A: 
Q: How much is 92 minus 88? A: 
Q: How much is 69 minus 28? A: 
Q: How much is 61 minus 20? A: 
Q: How much is 51 minus 28? A: 
Q: How much is 61 minus 18? A: 
Q: How much is 63 minus 20? A: 
Q: How much is 61 minus 28? A: 