Question: Dawn, Lydia, and Donna have a total of 200 bananas. Dawn has 40 more bananas than Lydia. If Lydia has 60 bananas, how many bananas does Donna have?
Answer: If Lydia has 60 bananas, and Dawn has 40 more, then Dawn has 60 + 40 = 100 bananas. The total number of bananas Dawn and Lydia have is 100 + 60 = 160 bananas. Donna has 200 - 160 = 40 bananas. The answer is 40.

Question: Marcus is having a water balloon party. He has 100 balloons. Each balloon holds 3 ounces of water. He can buy 50 ounces of water for $2.5 a bottle. If he walks into the store with 2 $10 bills, how much change will he have after he buys all the water he needs?
Answer: He will need 300 ounces of water because 100 x 3 = 300. He will need 6 bottles because 300 / 50 = 6. This will cost $15 because 6 x 2.5 = 15. He has $20 because 2 x 10 = 20. He will get $5 in change because 20 - 15 = 5. The answer is 5.

Question: Every hour Joanne has to collect the coins out of the fountain inside the mall. During the first hour, she collected 15 coins. For the next two hours, she collected 35 coins from the fountain. In the fourth hour, she collected 50 coins from the fountain but she gave 15 of them to her coworker so she could buy a soda. How many coins did she have after the fourth hour?
Answer: 15 coins collected in hour one. 35 coins collected in hour two. 35 coins collected in hour three. 50 coins collected in hour four. Before giving her coworker some coins there were 15 + 35 + 35 + 50 = 135 coins. The number of coins after given 15 to her coworker is 135 - 15 = 120. The answer is 120.

Question: Sue works in a factory and every 30 minutes, a machine she oversees produces 30 cans of soda. How many cans of soda can one machine produce in 8 hours?
Answer:
Since there are 2 sets of 30 minutes in an hour, then in 8 hours there are 8 x 2 = 16 sets of 30 minutes. Hence, a machine that Sue oversees can produce 30 cans x 16 = 480 cans of soda in 8 hours. The answer is 480.