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Unit 1 - Lesson 15 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 1
Lesson 15: More Factors, More Problems
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 1
Lesson 15: More Factors, More Problems
CC BY 2021 Illustrative Mathematics®
Lesson: More Factors, More Problems

Number Talk: Tens (Warm Up)

Find the value of each expression mentally.

1 x 10

2 x 10

3 x 10

4 x 10

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

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

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

Equation: _______
Solution: _______

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?

Cool Down: Solve the Problem
Solve each problem. Explain or show your reasoning.

There are 4 boxes. Each box has 10 toys. How many toys are there?

Elena has 10 socks. She puts them in piles of 2. How many piles does she make?