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6th-8th Grade Math: Practice & Review55 chapters | 469 lessons

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Lesson Transcript

Instructor:
*Yuanxin (Amy) Yang Alcocer*

Amy has a master's degree in secondary education and has taught math at a public charter high school.

Watch this video lesson to learn how the U.S. measures weight and how you can convert between them. Learn the conversion numbers that you need for each conversion along with the proper operation.

How does the United States measure weight? The **U.S. weight measurement units** are ounces, pounds, and tons. When you go to the post office to mail off a letter or package, the post office will weigh your letter or package in ounces. When you weigh yourself at the gym or at the doctor's, you will see your weight in pounds. When you weigh a car or a big truck, you will see the weight in tons. As you can see, there are units for measuring small things (ounces), medium things (pounds), and large things (tons). Ounces are smaller units than pounds, and pounds are smaller than tons.

To convert between ounces, pounds, and tons, you will need to make use of special conversion numbers. These special conversion numbers come from how many ounces are in a pound and how many pounds are in a ton. There are 16 ounces in 1 pound and 2,000 pounds in 1 ton.

- 1 pound = 16 ounces
- 1 ton = 2,000 pounds

Because there are 16 ounces in 1 pound, the conversion number between ounces and pounds is 16. The conversion number between pounds and tons is 2,000 because there are 2,000 pounds in 1 ton. So, how do you use these conversion numbers? Remember this: To convert from larger to smaller, you multiply by your conversion number, and when you convert from smaller to larger, you divide by your conversion number.

So, to convert pounds to ounces, you multiply by 16. To convert ounces to pounds, you divide by 16. To convert from tons to pounds, you multiply by 2,000. To convert from pounds to tons, you divide by 2,000.

To convert between tons and ounces, you can do it in two steps. First, convert the tons to pounds, then the pounds to ounces. 1 ton has 2,000 pounds. Each pound has 16 ounces, so multiplying the 2,000 pounds by 16, you get 2,000 * 16 = 32,000 ounces. So, there are 32,000 ounces in 1 ton. This gives you a conversion number of 32,000 between tons and ounces. To convert from tons to ounces, you multiply by 32,000. To convert ounces to tons, you divide by 32,000. Let's look at a couple of examples.

Convert 62 ounces to pounds. You are converting ounces to pounds. You are going from smaller to larger, so you divide by the conversion number. The conversion number is 16, so you divide by 16. 62 / 16 = 3.875 pounds. So, 62 ounces is the same as 3.875 pounds.

Convert 4 tons to pounds. You are converting tons to pounds. You are going from larger to smaller, so you need to multiply. The conversion number is 2,000, so you are multiplying by 2,000. So, multiplying the 4 by 2,000 gives you 4 * 2,000 = 8,000 pounds. So, 4 tons is equal to 8,000 pounds.

What have you learned? The **U.S. weight measurement units** are ounces, pounds, and tons. There are 16 ounces in 1 pound, 2,000 pounds in 1 ton and 32,000 ounces in a ton. To convert pounds to ounces, you multiply by 16. To convert ounces to pounds, you divide by 16. To convert from tons to pounds, you multiply by 2,000. To convert from pounds to tons, you divide by 2,000. To convert from tons to ounces, you multiply by 32,000. To convert ounces to tons, you divide by 32,000.

Once you are finished, you'll find you can:

- List the U.S. weight measurement units
- Recite the weight equivalencies for the measurement units
- Convert different values between the weight measurement units

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13 in chapter 36 of the course:

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6th-8th Grade Math: Practice & Review55 chapters | 469 lessons

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