Lesson 12 Compare Measurements

- Let’s solve story problems in which we compare lengths.

Warm-up Notice and Wonder: 6, 8, and 14

What do you notice?
What do you wonder?

$6 + 8 = 14$

$8 + 6 = 14$

$14 - 6 = 8$

$14 - 8 =$

Activity 1 Friendship Bracelets

Priya and Han are comparing the lengths of their friendship bracelets.
Han’s bracelet is 14 cubes long.
The length of Priya’s bracelet is 4 cubes fewer than Han’s bracelet.
How long is Priya’s bracelet?
Show your thinking using drawings, numbers, or words.

Activity 2 Same Bracelets, Different Story

Han’s bracelet is 4 cubes longer than Priya’s bracelet.
Priya’s bracelet is 10 cubes long.
How long is Han’s bracelet?
Show your thinking using drawings, numbers, or words.

Activity 3 Introduce Write Numbers: Numbers to 120 by 1

We are going to learn a new way to play Write Numbers.

Practice Problem

Problem 1

Priya’s friendship bracelet is 11 cubes long.
Han’s friendship bracelet is 3 cubes shorter than Priya’s friendship bracelet.
How long is Han’s friendship bracelet?
Show your thinking using drawings, numbers, words, or equations.