Lesson: Adding and Subtracting Money: USD

Sophia was counting the coins in her money box. She had 62 coins. 29 of them were quarters and the rest were dimes. She wants to know how many dimes are in her money box.

Which part-part-whole diagram represents this problem?

Jacob was counting the coins in his money box. He had 34 quarters and 21 dimes. He wants to know how many coins are in his money box.

Which part-part-whole diagram represents this problem?

David, Jennifer, and Matthew each have the same amount of money. David has only nickels, Jennifer has only dimes, and Matthew has only quarters. What is the least amount of money that each of them could have?