Q: How much is 77 minus 42? A: 
Q: How much is 84 minus 45? A: 
Q: How much is 78 minus 42? A: 
Q: How much is 77 minus 46? A: 
Q: How much is 87 minus 42? A: 
Q: How much is 77 minus 22? A: 
Q: How much is 83 minus 48? A: 
Q: How much is 77 minus 42? A: 