Q: How much is 71 minus 70? A: 
Q: How much is 53 minus 43? A: 
Q: How much is 71 minus 70? A: 
Q: How much is 71 minus 70? A: 
Q: How much is 91 minus 70? A: 
Q: How much is 71 minus 40? A: 
Q: How much is 80 minus 79? A: 
Q: How much is 71 minus 70? A: 