Q: How much is 70 minus 59? A: 
Q: How much is 81 minus 49? A: 
Q: How much is 79 minus 59? A: 
Q: How much is 70 minus 50? A: 
Q: How much is 80 minus 59? A: 
Q: How much is 70 minus 69? A: 
Q: How much is 77 minus 56? A: 
Q: How much is 70 minus 59? A: 