Teacher Guide: Lesson 18.8

The Weekly Reader Connections feature on Kids' Place Houghton Mifflin Math provides your students with additional information about the topics that appear in the Curriculum Connection feature in their student books.

In the article “Taking Credit for Taking Responsibility” students learn how credit cards and debit cards work. They also are alerted to the extra, sometimes “hidden,” costs involved in being a cardholder. Emphasize the importance of keeping one's credit or debit cards in a safe place, being sure to get the card back after each use, and being prudent about securing the card numbers.

The Word Wise activity asks students to compare the definitions of credit and debit. Encourage students to share their suggestions for appropriate alternative names for “credit cards” and “debit cards.”

To find the answer to the first of the Data Hunt activity multiple-choice questions, students simply find the total cost of the two items and subtract that amount from the amount in the debit card account.

1. Suppose your older brother has \$139.26 in his debit card account. If he buys a CD for \$16.87 and a CD storage case for \$23.75, how much will be left in his account? (\$98.64)

The next three questions involve a credit card account.

2. Suppose your dad uses his credit card to place an online order for an offshore fishing bag. The bag is priced at \$74.99 and there is a 6% tax. Shipping and handling costs come to \$14.65. How much will be charged against the credit card for this purchase? (\$94.14)
3. Suppose your dad is looking over his latest credit card statement. In addition to the charges for the fishing bag, he sees these two charges on the statement: \$209.19 and \$157.50. What is the new balance on this statement? (\$460.83)
4. Now suppose your dad pays only \$200 of his new balance. At 18% interest, what will be the interest on the unpaid balance? (\$47.00)