Grade 3 Unit 3
Lesson 20: More Practice to Represent and Solve
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 3
Lesson 20: More Practice to Represent and Solve
CC BY 2021 Illustrative Mathematics®
Problem Card:
A room has some chairs set up in rows and some chairs stacked up in a corner.
How many chairs are in the room?
Find the value of each expression mentally.
20 + (2 x 3)
30 + (4 x 3)
50 + (8 x 3)
90 + (8 x 3)
Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.
Solve the problem independently.
Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.
Solve the problem independently.
Describe something you really understand well after today’s lesson or describe something that was confusing or challenging.