Grade 2 Unit 7
Lesson 9: Add Three-digit Numbers
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 9: Add Three-digit Numbers
CC BY 2021 Illustrative Mathematics®
Find the value of each expression mentally.
528 + 2
528 + 7
487 + 3
487 + 8
Find the value of each expression. Show your thinking.
384 + 409
757 + 152
262 + 438
Noah and Kiran showed how they found the value of 267 + 338.
How is Noah and Kiran’s work the same? How is it different?
Which student found the correct value? Explain or show your thinking.
Priya used a diagram to find the value of 565 + 247.
Did she find the correct value? Explain or show your thinking.
575 + 166
