Q: What is 40 minus 29? A: 
Q: What is 19 minus 15? A: 
Q: What is 49 minus 29? A: 
Q: What is 40 minus 20? A: 
Q: What is 90 minus 29? A: 
Q: What is 40 minus 39? A: 
Q: What is 47 minus 26? A: 
Q: What is 40 minus 29? A: 