Q: How much is 89 minus 30? A: 
Q: How much is 75 minus 37? A: 
Q: How much is 85 minus 30? A: 
Q: How much is 89 minus 35? A: 
Q: How much is 99 minus 30? A: 
Q: How much is 89 minus 70? A: 
Q: How much is 94 minus 35? A: 
Q: How much is 89 minus 30? A: 