Measuring Lengths (Nonstandard & Standard Units) — Answer Key
Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1. inch
2. long
3. short
4. ruler
5. unit
6. cube
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A ruler is used to measure how long something is.
A ruler has inch marks along its edge, so we line it up against an object to find its length.
2. We can measure length using paper clips.
Paper clips are all the same size, so we can line them up end to end and count how many fit along an object.
3. An inch is a standard unit of length.
An inch is the same size everywhere, which is why it counts as a standard unit that everyone agrees on.
4. A pencil is longer than a cube.
A single cube is only about an inch wide, while a pencil stretches several inches, so the pencil is the longer one.
Part C: True or False?
Read each statement. Circle True or False.
1. A paper clip can be used to measure length.
True False
Yes, paper clips work as nonstandard units because each one is the same size, so you can count how many fit along an object.
2. A crayon is shorter than a school bus.
True False
A crayon fits in your hand and a school bus is many feet long, so the crayon is much shorter.
3. You cannot measure things with cubes.
True False
We absolutely can measure with cubes by snapping them in a line and counting how many match the object's length.