Mathematics Grade 4 15 min

Compare customary units by multiplying

Compare customary units by multiplying

Tutorial Preview

1

Introduction & Learning Objectives

Learning Objectives Identify the relationship between larger and smaller customary units of length, weight, and capacity. Recall common customary conversion facts (e.g., 1 foot = 12 inches). Use multiplication to convert a larger customary unit into a smaller one. Set up a multiplication equation to solve a conversion problem. Compare two measurements in different customary units by first converting one of them. Use comparison symbols (<, >, =) correctly after converting units. Which is heavier, a 3-pound bag of apples or a 40-ounce bag of grapes? 🍎🍇 Let's find out how to be sure! In this lesson, you will learn how to change larger units, like feet, into smaller units, like inches, using multiplication. This special skill helps us accurately compare amounts, so...
2

Key Concepts & Vocabulary

TermDefinitionExample Customary UnitsThe system of measurement used most often in the United States. It includes units like inches, feet, pounds, ounces, cups, and gallons.A ruler measures length in inches and feet, which are customary units. ConvertTo change a measurement from one unit to another, like changing feet into inches, without changing its actual size or value.You can convert 1 foot to 12 inches. The length stays the same, but the number and unit change. CompareTo see if one amount is greater than (>), less than (<), or equal to (=) another amount.To compare 5 and 8, we can say 5 < 8 (5 is less than 8). Conversion FactorThe number you multiply by to change from a larger unit to a smaller unit. It tells you how many smaller units are in one larger unit.The conversion fa...
3

Core Formulas

The 'Large to Small' Multiplication Rule Number of Small Units = Number of Large Units × Conversion Factor When you are converting from a LARGER unit (like yards) to a SMALLER unit (like feet), you will always multiply. Think of it like this: a big unit needs to be broken up into many smaller pieces, so the number gets bigger. Customary Unit Conversion Table Length: 1 ft = 12 in, 1 yd = 3 ft | Weight: 1 lb = 16 oz | Capacity: 1 gal = 4 qt, 1 qt = 2 pt, 1 pt = 2 c This table provides the key 'conversion factors' you need to use in your multiplication problems. You must use the correct fact for the units you are working with.

5 more steps in this tutorial

Sign up free to access the complete tutorial with worked examples and practice.

Sign Up Free to Continue

Sample Practice Questions

Challenging
A python is 5 feet long. A garter snake is 52 inches long. How many inches longer is the python?
A.2 inches
B.47 inches
C.12 inches
D.8 inches
Challenging
Which of the following measurements represents the greatest length?
A.4 yards
B.11 feet
C.150 inches
D.3 yards
Challenging
A bookshelf is 2 yards long. A toy train is 4 times as long as a 1-foot ruler. Which is longer?
A.The bookshelf
B.The toy train
C.They are the same length.
D.The train is half as long.

Want to practice and check your answers?

Sign up to access all questions with instant feedback, explanations, and progress tracking.

Start Practicing Free

More from Units of measurement

Ready to find your learning gaps?

Take a free diagnostic test and get a personalized learning plan in minutes.