# Lesson 10 Measure with a Torn Tape

Let’s measure without starting at 0.

## Warm-up True or False: Constant Difference

Decide if each statement is true or false. Be prepared to explain your reasoning.

## Activity 1 The Notebook Problem

Jada and Han used an inch ruler to measure the short side of a notebook.

Han says 8 inches.

Jada says 8 inches.

How did Han and Jada get the same measurement?

Write an equation that could show Jada’s thinking.

Measure an object using Jada’s method.

I measured a .

I started with the number .

I ended with the number .

Equation: .

The length of my object is

What do you notice about you and your partner’s measurements?

## Activity 2 A Desktop to Measure

Lin is measuring her desktop in inches.

What is the length of the long side of the desktop? Show your thinking using drawings, numbers, or words.

Equation:

The long side of the desktop is .

What is the length of the short side of the desktop? Show your thinking using drawings, numbers, or words.

Equation:

The short side of the desktop is .

## Practice Problem

## Problem 1

What is the length of this rectangle in centimeters?

Write an equation to show your thinking.