Length Measurement Examples in Math

Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Length Measurement.

This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Math.

Concept Recap

Measuring how long something is using standard units (cm, m, in, ft) by finding the difference between start and end marks.

Measuring length is like asking 'how many of this unit fit end-to-end along the object?' Lay paper clips along a pencil—the number of clips is its length in paper-clip units.

Read the full concept explanation →

How to Use These Examples

  • Read the first worked example with the solution open so the structure is clear.
  • Try the practice problems before revealing each solution.
  • Use the related concepts and background knowledge badges if you feel stuck.

What to Focus On

Core idea: Length measurement finds how long something is by counting how many same-size units fit along it, end mark minus start mark.

Common stuck point: The procedure for length measurement is the easy part; the trap is leaving gaps or overlaps between units. Asking "Am I counting equal-size units along an object, or finding end mark minus start mark?" first is what keeps a correct-looking calculation from being attached to the wrong concept.

Sense of Study hint: Ask: Am I counting equal-size units along an object, or finding end mark minus start mark?

Worked Examples

Example 1

easy
A pencil is measured using paper clips as units. It takes 5 paper clips placed end to end to match the length of the pencil. How long is the pencil in paper clip units?

Answer

5 paper clip units

First step

1
Each paper clip is one unit of length.

Full solution

  1. 2
    Count the paper clips laid end to end: 1, 2, 3, 4, 5.
  2. 3
    The pencil is 5 paper clip units long.
Measurement means using a repeated unit to describe how long something is. Here each paper clip is the unit.

Example 2

medium
A bookshelf is 36 inches long. A book is 12 inches wide. How many books can fit side by side on the shelf?

Example 3

medium
Convert 3.53.5 km to meters, then to centimeters.

Example 4

easy
Mom is tall. You are small. Who is taller?

Example 5

medium
You have a long red string and a short blue string. The red string is below the blue string. Which one is longer?

Example 6

medium
A pet snake stretches across two chairs. A pet bug fits on one finger. Which one is longer?

Example 7

easy
Mia lays paperclips next to a crayon. She counts 5 paperclips along the crayon. How many paperclips long is the crayon?

Example 8

easy
Liam wants to measure a marker with paperclips. The chain is 7 paperclips long. How long is the marker?

Example 9

medium
Noah lays blocks under his shoe. The shoe is 6 blocks long. His sister's shoe is 4 blocks long. Together, how many blocks long are their shoes?

Example 10

easy
A jump rope is 44 feet long. A pet leash is 77 feet long. Which is longer, and by how many feet?

Example 11

easy
A toy car is 55 inches long. A toy truck is 88 inches long. How many inches longer is the truck?

Example 12

hard
Theo's pencil starts at the 00 mark and ends at the 77 inch mark. His sister's pencil is 44 inches long. How many inches longer is Theo's pencil?

Example 13

easy
Mia has two ribbons. The red ribbon is 3434 cm long and the blue ribbon is 2525 cm long. If she lays them end to end, how long is the chain?

Example 14

easy
A table is 22 m long. How many centimeters long is the table?

Example 15

hard
A hallway is 55 m long. Theo lays down a 11 m 2020 cm rug, then a 22 m 5050 cm rug end to end. How many more centimeters of rug does he need to cover the hallway?

Practice Problems

Try these problems on your own first, then open the solution to compare your method.

Example 1

easy
A worm is 4 cubes long and a caterpillar is 7 cubes long. How much longer is the caterpillar?

Example 2

medium
A table is 48 inches long. A chair is 16 inches wide. How many chairs can line up along the table?

Example 3

easy
A pencil starts at the 00 mark and ends at the 99 cm mark. How long is it?

Example 4

easy
An object spans from the 22 cm mark to the 77 cm mark. How long is it?

Example 5

easy
Which unit is best for measuring the length of a pencil: centimeters or kilometers?

Example 6

easy
How many centimeters are in 11 meter?

Example 7

easy
A book is measured starting at the 00 mark, ending at 2020 cm. How long is it?

Example 8

easy
Which is longer: 11 meter or 5050 centimeters?

Example 9

easy
If you measure a crayon starting at 11 cm instead of 00, what mistake will you make?

Example 10

easy
How many inches are in 11 foot?

Example 11

medium
A pencil goes from the 33 cm mark to the 1111 cm mark. How long is it?

Example 12

medium
Which is the better unit for the length of a soccer field: meters or millimeters?

Example 13

medium
A ribbon is 1.51.5 m. How many centimeters is that?

Example 14

medium
Two pieces of string are 3535 cm and 4848 cm. How much longer is the second?

Example 15

medium
A rope is 250250 cm. Express its length in meters.

Example 16

medium
You lay 33 paper clips end to end, each 44 cm. How long is the chain?

Example 17

medium
A table is 11 m 2020 cm long. How many centimeters is that?

Example 18

medium
Measuring with a dual ruler, you read 44 on the inch side but need centimeters. Why is reading '44 cm' wrong?

Example 19

medium
Three boards are 3030 cm, 4545 cm, and 2525 cm. Laid end to end, what is the total length?

Example 20

challenge
A worm is measured from the 22 cm mark to the 9.59.5 cm mark, but the ruler was misaligned and started at 0.50.5 instead of 00. What is the worm's true length?

Example 21

challenge
A path is 1.21.2 km. A child's step is 4040 cm. About how many steps to walk it?

Example 22

challenge
A rectangle's length is 33 times its width. If the perimeter is 8080 cm, find the length.

Example 23

easy
A snake is long. A worm is short. Which one is longer?

Example 24

easy
A pencil and a crayon are next to each other. The pencil sticks out past the crayon. Which is shorter?

Example 25

easy
A bus and a car are parked. Which one is longer?

Example 26

easy
A baby is small. A grown-up is big. Who is shorter?

Example 27

medium
A giraffe is very tall. A dog is small. Which one is taller?

Example 28

medium
Two ribbons are lined up at the same start. The pink ribbon ends past the yellow ribbon. Which is shorter?

Example 29

hard
Three sticks are on the table. The brown stick is shorter than the green stick. The green stick is shorter than the white stick. Which stick is the longest?

Example 30

easy
A pencil is the same length as 6 paperclips laid end to end. How long is the pencil in paperclips?

Example 31

easy
A book is 4 blocks long. How long is the book in blocks?

Example 32

easy
A spoon is 3 blocks long. A fork is 4 blocks long. Which is longer?

Example 33

medium
A worm is 4 blocks long. A snake is 9 blocks long. How many more blocks is the snake than the worm?

Example 34

medium
A red strip is 5 paperclips long. A blue strip is 5 paperclips long. Which strip is longer?

Example 35

easy
A pencil starts at the 00 inch mark on a ruler and ends at the 66 inch mark. How long is the pencil?

Example 36

easy
A ribbon goes from the 22 inch mark to the 1111 inch mark on a ruler. How long is the ribbon?

Example 37

easy
How many inches are in 11 foot?

Example 38

medium
A pencil starts at the 33 inch mark and ends at the 1010 inch mark. How long is the pencil?

Example 39

medium
Sara's hair ribbon is 99 inches. Her sister's ribbon is 66 inches. How many inches longer is Sara's ribbon?

Example 40

easy
A pencil starts at the 00 cm mark and ends at the 1414 cm mark. How long is the pencil?

Example 41

easy
How many centimeters are in 11 meter?

Example 42

easy
A ribbon goes from the 44 cm mark to the 1818 cm mark on a ruler. How long is the ribbon?

Example 43

medium
A jump rope is 4646 cm long. Sara adds a 3838 cm piece to it. What is the new length of the rope?

Example 44

medium
Liam's pencil is 1818 cm long. His friend's pencil is 99 cm long. How many centimeters longer is Liam's pencil?
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Background Knowledge

These ideas may be useful before you work through the harder examples.

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