Q: What is 88 minus 78? A: 
Q: What is 70 minus 47? A: 
Q: What is 89 minus 78? A: 
Q: What is 88 minus 70? A: 
Q: What is 98 minus 78? A: 
Q: What is 88 minus 38? A: 
Q: What is 84 minus 79? A: 
Q: What is 88 minus 78? A: 