Q: The distance across a country is 8205 kilometers. Amelia started at one end and drove 907 kilometers on Monday and 582 kilometers on Tuesday. How many kilometers does Amelia still have to drive to make it across the country?
A: Distance driven = 907 + 582 = 1489 km. Distance remaining = 8205 - 1489 = 6716 km. Amelia still has 6716 kilometers to drive. The answer is 6716.

Q: Inez has $150. She spends one-half on hockey skates and a certain amount on hockey pads. If Inez has $25 remaining, how much did the hockey pads cost, together, in dollars?
A: She spent 150 / 2 = $75 on hockey skates. Let X be the amount Inez spent on hockey pads. 150 - 75 - X = 25. 75 - X = 25. X = 50. The hockey pads cost $50. The answer is 50.

Q: In a classroom, 10 children have 7 books each. Their teacher brings another 8 books to the classroom. How many books are in the classroom altogether?
A:
At first, the children have 10 * 7 = 70 books. With their teacher, they have 70 + 8 = 78 books. The answer is 78.