Measurement Conversion
Geometry, Measurement, and Data
Students convert between units within the same measurement system (customary and metric), including length, weight/mass, and liquid volume. They solve multi-step word problems requiring unit conversions.
Lernmaterial
4 SeitenThe Customary System
The Customary System#
The customary system is the measurement system used in the United States. It uses units such as inches, feet, pounds, and gallons. In Grade 4, you will learn to convert between units within this system.
Customary Length Conversions#
| Larger Unit | Smaller Unit | Conversion |
|---|---|---|
| 1 foot | 12 inches | × 12 |
| 1 yard | 3 feet | × 3 |
| 1 yard | 36 inches | × 36 |
| 1 mile | 5,280 feet | × 5,280 |
Examples:
- 3 feet = 3 × 12 = 36 inches
- 4 yards = 4 × 3 = 12 feet
- 2 miles = 2 × 5,280 = 10,560 feet
Customary Weight Conversions#
| Larger Unit | Smaller Unit | Conversion |
|---|---|---|
| 1 pound | 16 ounces | × 16 |
| 1 ton | 2,000 pounds | × 2,000 |
Examples:
- 5 pounds = 5 × 16 = 80 ounces
- 3 tons = 3 × 2,000 = 6,000 pounds
Customary Liquid Volume Conversions#
| Larger Unit | Smaller Unit | Conversion |
|---|---|---|
| 1 cup | 8 fluid ounces | × 8 |
| 1 pint | 2 cups | × 2 |
| 1 quart | 2 pints | × 2 |
| 1 gallon | 4 quarts | × 4 |
Memory aid: Giant Quirky People Cry → Gallon, Quart, Pint, Cup (each bigger than the next)
The Rule: Larger to Smaller = Multiply#
When converting from a larger unit to a smaller unit, you multiply by the conversion factor. This makes sense because you need more of the smaller unit to make the same amount.
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