Question: Tabitha has 25 dollars. She gives her mom 8 dollars and invests half what is left in a money market. She spends some money on 5 items that costs 50 cents each. How much money does Tabitha have left?
Answer: Tabitha has 25 - 8 = 17 dollars after giving some to her mom. Tabitha has 17 / 2 = 8.5 dollars left after putting some in a money market. The 5 items Tabitha buys totals out to 5 * 0.5 = 2.50 dollars. Tabitha has 8.5 - 2.5 = 6 dollars left. The answer is 6.

Question: Twice Angie's age, plus 4, is 20. How old is Angie?
Answer: Twice Angie's age is 20 - 4 = 16. Angie is 16 / 2 = 8. The answer is 8.

Question: Willie came back from Europe with 70 euros. Normally 5 euros is worth 1 dollar, but the money exchange at the airport will only give Willie 5/7ths of the official exchange rate. How many dollars does Willie get?
Answer: First first out how many euros Willie should have gotten using the official exchange rate: 70 euros / 5 euros / dollar = $14. Then multiply this quantity by 5 / 7 to find how many dollars he actually got: 14 dollars * 5 / 7 = $2 * 5 = $10. The answer is 10.

Question: A baker bakes 5 loaves of bread an hour in one oven. He has 4 ovens. From Monday to Friday, he bakes for 5 hours, but on Saturday and Sunday, he only bakes for 2 hours. How many loaves of bread does the baker bake in 3 weeks?
Answer:
In an hour, the baker bakes 5 x 4 = 20 loaves of bread. From Monday to Friday, he bakes 5 x 20 = 100 loaves of bread per day. From Monday to Friday, he bakes a total of 100 x 5 = 500 loaves of bread. On Saturday and Sunday, he bakes 2 x 20 = 40 loaves of bread per day. On Saturday and Sunday, he bakes a total of 40 x 2 = 80 loaves of bread. In a week, he bakes 500 + 80 = 580 loaves of bread. In 3 weeks, he bakes 580 x 3 = 1740 loaves of bread. The answer is 1740.