Grade 2 Math · Level 4, Arithmetic within 100
Measurement Relationships
Understand common relationships between units such as inches and feet or centimeters and meters.
Questions like
- 12 in = 1 ft
How the lesson starts: Measurement Relationships
The toy contest
Welcome to the toy contest! Judge Ruby has a ruler marked in inches. She measures every toy and prize. Who will be the longest? Let's measure along!
Start at zero
Ruby lines up a pencil with zero on her ruler. The pencil ends at 7. So the pencil is 7 inches long! Always start at zero, then read the end.
Inches or feet?
An inch is small, about a paper clip. Use inches for crayons and pencils. A foot is 12 inches, as long as a ruler. Use feet for doors and buses.