Lesson 15 Problem Solving with Line Plots

- Let’s solve problems using a line plot.

Warm-up Number Talk: Multiply by 18

Find the value of each expression mentally.

$\frac{1}{3} \times 18$
$\frac{2}{3} \times 18$
$\frac{4}{3} \times 18$
$\frac{5}{3} \times 18$

Activity 1 Info Gap: Picking Fruit

Problem 1

Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Pause here so your teacher can review your work.

Problem 2

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

Activity 2 Mathematical Questions

This line plot shows the weights of some apricots that Mai picked.

Dot plot titled Mai's Apricots.

What fraction of the apricots weigh less than $1 \frac{1}{2}$ ounces? Explain or show your reasoning.
Write a multiplication equation that represents the total weight of the apricots that each weigh $1 \frac{5}{8}$ ounces.
Do all of Mai’s apricots together weigh more or less than a pound? Explain or show your reasoning.

Practice Problem

Problem 1

Han is making a line plot of the seedlings his class grew. This is what he has done so far.

Dot plot titled Growing Plants from 0 to 3 by 1’s.

Use this information to complete the line plot. Explain or show your reasoning.

There are 15 seedlings altogether.
The tallest seedling is $2 \frac{1}{8}$ taller than the shortest seedling.
There are 3 seedlings of the shortest height.