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Unit 4 - Lesson 5 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 4
Lesson 5: Write Division Expressions
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 4
Lesson 5: Write Division Expressions
CC BY 2021 Illustrative Mathematics®
Lesson: Write Division Expressions

Number Talk: What’s the Same? (Warm Up)

Find the value of each expression mentally.

225 - 100

227 - 102

230 - 105

220 - 95

Card Sort: All about Bugs

Your teacher will give you a set of cards that show situations. Sort the cards into 2 categories of your choosing.

Be prepared to explain the meaning of your categories.

Write a division expression to represent the situation.

Mole crickets have special legs for digging. Ten special legs belong to 5 mole crickets. How many special legs does each mole cricket have?

Explain your reasoning.

Write a division expression to represent the situation.

A beetle has a pair of antennae for sensing heat, touch, smell, and more. If there are 8 antennae, how many beetles are there?

Explain your reasoning.

Write a division expression to represent the situation.

Fourteen antennae belong to a group of bees. If each bee has 2 antennae, how many bees are there?

Explain your reasoning.

Write a division expression to represent the situation.

There are 12 wings. If each dragonfly has 4 wings, how many dragonflies are there?

Explain your reasoning.

Write a division expression to represent the situation.

Thirty legs belong to 5 ants. If all the ants have the same number of legs, how many legs does each ant have?

Explain your reasoning.

Write a division expression to represent the situation.

There are 50 spots on 5 butterflies. If each butterfly has the same number of spots, how many spots does each butterfly have?

Explain your reasoning.

Solve a Buggy Problem

Your teacher will assign a problem to your group.

Create a visual display that shows your thinking and your solution to the problem.

Cool Down: Ant Legs
Twenty-four legs belong to 4 ants. All ants have the same number of legs.

Write a division expression to represent this situation.

How many legs does each ant have? Explain or show your reasoning.