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Convert Customary Units of Length

Sep 20, 2022

Some basic customary units of length and relation between them

Distance of customary units (Approximate)

We can relate the length of units with the given examples:

1. The length of a quarter is about 1 inch.
1. The length of man’s shoe is about 1 foot.
1. The length of a Guitar is about 1 yard.
1. The length of a runway at a large airport is about 1 mile.

Some other examples

• 1st image – Paper clip ( Approx 1 inch)
• 2nd image – Book (Approx 1 feet)
• 3rd image – Width of door (Approx 1 yard)

Conversion between the units

Example 1:

Convert 5 feet into inches

Since, 1 foot =12 inches, Therefore 5 feet = 5 × 12 = 60 inches

Example 2:

Convert 12 feet into yards,

Since, 1 foot = 1/3 yard,

Therefore, 12 feet = 1/3× 12 yard = 4 yards

Convert larger units into smaller units

To convert larger units into smaller units, we need to multiply with the related value.

Convert feet into inches

1. 6 feet into inches

Since 1 feet = 12 inches

Therefore, 6 feet = 6 × 12 inches

= 72 inches

2. 3 yards into feet

Since, 1 yard = 3 feet

Therefore, 3 yards = 3 × 3 feet

= 9 feet

3. 3 yards into inches

Since, 1 yard = 36 inches

Therefore, 3 yards = 36 × 3 inches

= 108 inches

Convert smaller units into larger units

To convert smaller units into larger unit we need to divide with the related value.

1. Convert inches into feet

Since 12 inches = 1 feet

So, 1 inch = 1/12 feet

Now, for 36 inches = 1/12× 36

Therefore, 36 inches = 3 feet

2. Convert feet into yard

Since, 3 feet = 1 yard

So, 1 foot = 1/3yard

Now, for 9 yard = 1/3× 9 yard

= 3 yards

Example 1:

What if you want to measure the distance from your house to your friend’s house? What unit you will use?

1. Standard System – Mile
2. A mile is a long way if you think about it – 1 mile = 1760 yard / 5280 feet

Example 2:

Q1. What is the length of toy car in inches?

Step 1: Place the ruler at the image.

Step 2: Check the numbers to count.

What have we learned

• Student have learned about the identification of units of length.
• Convert smaller units to large unit
• Convert larger unit to smaller unit
• With different model of images students have become familiar of units of length.

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