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Grade 4 · Maths · Lessons
How many in one
📏feet🥤liters⏱️minutes✖️times
Unit tables.
The big ideaA smaller unit makes a bigger number. Multiply by the fact.

How it works

A smaller unit makes a bigger number. Multiply by the fact.

1 yard is 3 feet, 1 liter is 1000 milliliters, 1 hour is 60 minutes.

Say which way you are going: big unit to small unit means multiply.

Length and volume• 1 yd = 3 ft• 1 L = 1000 mLTime• 1 hr = 60 min• 1 min = 60 s
Unit facts.

Example 1: Yards to feet

  1. 5 yd = ? ft
  2. 1 yard is 3 feet.
  3. 5 × 3 = 15.
  4. So the answer is 15.

Example 2: Liters to milliliters

  1. 2 L = ? mL
  2. 1 liter is 1000 milliliters.
  3. 2 × 1000 = 2000.
  4. So the answer is 2000.

Example 3: Hours to minutes

  1. 5 hr = ? min
  2. 1 hour is 60 minutes.
  3. 5 × 60 = 300.
  4. So the answer is 300.

Words to know

unit
A fixed amount used to measure.
convert
To change from one unit to another.

Watch out

Try it

  1. 1 yard is 3 feet. How many feet in 4 yards?
  2. How many minutes in 2 hours?
  3. How many milliliters in 3 liters?
  4. Which gives a bigger number for the same length, feet or yards?
Answers: 1. 12 · 2. 120 · 3. 3000 · 4. feet
For grown-upsMake a chart of unit facts for the fridge and quiz each other.
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