Shows how to use addition to find out whether the coins two people have are enough to pay for various items and looks at different coins, from a penny to a half dollar.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.