# Lesson 9 From Feet to Inches

Let’s measure longer lengths with customary units.

## Warm-up Estimation Exploration: Small Fry, Big Fish

How long is this cobia fish in inches?

Record an estimate that is:

too low

about right

too high

Record an estimate that is:

too low

about right

too high

## Activity 1 Measure the Length of Fish

## Problem 1

Work with your group to measure the tape strips around the classroom in feet. Then measure the length in inches.

Tape A: largemouth bass

Length in feet:

Length in inches:

Tape B: spiny dogfish shark

Length in feet:

Length in inches:

Tape C: catfish

Length in feet:

Length in inches:

Tape D: koi

Length in feet:

Length in inches:

## Problem 2

What did you notice about the number of feet compared to the number of inches when you measured the tape strips?

## Activity 2 Inches or Feet?

Estimate the length of objects around the room. Say if you will measure in inches or feet.

object to measure

my estimate

circle inches or feet

inches

feet

inches

feet

inches

feet

inches

feet

Choose the best tool to measure each object. Complete the table to record your actual measurements.

object to measure

measurement tool

actual length (include unit)

## Practice Problem

## Problem 1

An adult hippopotamus is 13 units long. Are the units inches or feet? Explain your reasoning.

A piece of chalk is 2 units long. Are the units inches or feet? Explain your reasoning.