Dear Family, ©Curriculum Associates, LLC Copying is not permitted. 27 Lesson 4 Multiply and Divide Positive and Negative Integers Your child is learning about multiplying and dividing positive and negative integers. Use with Ready Instruction Lesson 4 Here are some examples of multiplying and dividing positive and negative integers that may be familiar to you. • You set up an automatic deduction of a whole-dollar amount from a bank account each month to pay a bill. You can multiply the negative amount deducted by the number of months to find the amount deducted over a period of several months. • You set up an automatic deposit of a whole-dollar amount to a savings account. You can multiply the positive amount deposited by the number of months to find the total amount deposited over a period of several months. • A plane descends a number of feet in a number of seconds. You can divide the negative number of feet by the number of seconds to find the negative change in the plane’s elevation per second. Here are the rules for multiplying positive and negative integers. positive 3 positive 5 positive positive 3 negative 5 negative negative 3 positive 5 negative negative 3 negative 5 positive Consider the following example: A news account reported that the price of a stock dropped by 4 dollars a day for each of 3 consecutive days. How much did the stock price change over the 3 days? NEWS On the next page you will see two different ways your child may use integer multiplication to find the amount that the price of the stock dropped.