# Lesson 15 More Factors, More Problems

Let’s solve more multiplication problems.

## Warm-up Number Talk: Tens

Find the value of each expression mentally.

## Activity 1 Represent Situations with Equations

For each problem:

Write an equation with a symbol for the unknown to represent the situation.

Find the number that makes the equation true. Show your reasoning.

## Problem 1

There are 15 plates. Han placed 5 plates on each table. How many tables have plates on them?

Equation:

Solution:

## Problem 2

Lin made 6 sandwiches. She used 2 slices of bread for each sandwich. How many pieces of bread did she use?

Equation:

Solution:

## Problem 3

Han has 60 ice cubes. The ice cubes are in trays of 10. How many trays of ice cubes does Han have?

Equation:

Solution:

## Activity 2 Multiplication Mashup

Solve each problem. Explain or show your reasoning.

Clare has 16 socks. She puts them in piles of 2. How many piles can she make?

Diego has 8 piles of socks. Each pile of socks has 2 socks. How many socks does Diego have?

Andre has 16 socks. He puts them in 8 groups that are the same size. How many socks are in each group?

The store has 9 boxes. Each box has 5 shirts. How many shirts are there?

A store has 80 sweaters. There are 8 sweaters in each pile on a shelf. How many piles of sweaters are on the shelf?

## Practice Problem

## Problem 1

Solve each problem. Explain or show your reasoning.

There are 6 flowers. Each flower has 5 petals. How many petals are there?

There are 50 petals on some flowers. Each flower has 5 petals. How many flowers are there?