Q: How much is 70 minus 57? A: 
Q: How much is 51 minus 40? A: 
Q: How much is 79 minus 57? A: 
Q: How much is 70 minus 50? A: 
Q: How much is 90 minus 57? A: 
Q: How much is 70 minus 57? A: 
Q: How much is 79 minus 56? A: 
Q: How much is 70 minus 57? A: 