Measurement in the Customary System

Measurement in the Customary System

I can convert units of measurement in the customary system and solve real-world problems.

Customary Units

Measurement units are broken into categories of length, weight, capacity, and time.

Multiple Select

What are the categories of measurement?

• Rulers, feet, inches, ounces

• Length, weight, capacity, time

Using Multiplication to convert measurements

• Use Multiplication to convert larger units of measurement to smaller units of measurement.

• When the units are smaller you need more of them to express the same measurement.

Multiple Choice

A juice company sells juice in gallon-sized containers. If the company produces the number of gallons of juice every quarter given in the table, how many quarts will be produced in the first quarter? (Hint:Gallon>Quart, 1 gallon = 4 quarts)

• 24 Quarts

• 4 Quarts

• 12 Quarts

• 10 Quarts

Using Division to Convert Measurement

• Use division to convert smaller units of measurement to larger units of measurement

• When the units are larger you need fewer of them to express the same measurement

Multiple Choice

A doctor weighs a one-month-old baby during a checkup. The baby weighs 128 ounces. How many pounds are in 128 ounces? (Hint: Ounces<Pounds; 1 Pound = 16 ounces)

• 2048 Pounds

• 16 Pounds

• 8 Pounds

• 17 Pounds

Use Conversion Factors to convert measurement

• A conversion factor is a ratio written as a fraction that expresses the same measure in 2 different units. (ex. 1ft/12in or 12in/1ft)

• Set up what you know as a fraction over 1 (ex. 36in/1)

• ALWAYS use multiplication

• Use the conversion factor with the measurement you already have as the denominator

• Units diagonal of each other will cancel each other out and leave you with the measure you are finding

Multiple Choice

A watermelon is shot out of an air cannon and travels 22 yards. How many feet does the watermelon travel? Which conversion factor could you use to answer the question?  (Hint: you are converting yards to feet 1 yard = 3 feet; you also know that you have 22 yards and will have to place it over a 1 to make it a fraction)

• $\frac{1yd}{3ft}$

• $\frac{1ft}{3yd}$

• $\frac{3yd}{1ft}$

• $\frac{3ft}{1yd}$