Unit 7 - Lesson 16 - Grade 2: Illustrative Mathematics

Last updated about 1 year ago

17 questions

Note from the author:

Grade 2 Unit 7
Lesson 16: Subtract Within 1,000
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 2 Unit 7
Lesson 16: Subtract Within 1,000
CC BY 2021 Illustrative Mathematics®

Lesson: Subtract Within 1,000

True or False: Equations Based on Place Value (Warm Up)

Decide if each statement is true or false. Be prepared to explain your reasoning.

Jada’s Thinking

Jada is thinking about how to find the value of 402-298.

Find It Your Way

Find the value of each expression in a way that makes sense to you. Show your thinking. Organize it so it can be followed by others.

Cool Down: Find the Difference Your Way

Unit 7 - Lesson 16 - Grade 2: Illustrative Mathematics

Unit 7 - Lesson 16 - Grade 2: Illustrative Mathematics

True or False: Equations Based on Place Value (Warm Up)

Jada’s Thinking

Find It Your Way

True or False: Equations Based on Place Value (Warm Up)

Jada’s Thinking

Discuss how Jada’s equations match Lin’s diagram.

Finish Jada’s work to find the value of 582 - 145.

Jada says she knows a way to count on to find the difference. She showed her thinking using a number line.

Explain Jada’s thinking.

Jada says you can’t decompose to find the value of because there aren’t any tens.

Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show your
thinking.

Find It Your Way

525 - 214

700 - 589

683 - 398

918 - 608

735 - 457

602 - 487

Choose one expression and find the value by subtracting by place.

Show your thinking.

Explain why you chose that expression.

Choose a different expression and find the value using a different method.

Show your thinking.

Explain why you chose that expression.

2 hundreds + 3 tens + 4 ones =
2 hundreds + 3 tens + 14 ones

2 hundreds + 3 tens + 4 ones =
1 hundred + 13 tens + 4 ones

1 hundred + 13 tens + 4 ones =
1 hundred + 12 tens + 14 ones

Discuss how Jada’s equations match Lin’s diagram.

Finish Jada’s work to find the value of 582 - 145.

Jada says you can’t decompose to find the value of because there aren’t any tens.

Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show your
thinking.

525 - 214

700 - 589

683 - 398

918 - 608

735 - 457

602 - 487

Choose one expression and find the value by subtracting by place.

Show your thinking.

Explain why you chose that expression.

Choose a different expression and find the value using a different method.

Show your thinking.

Explain why you chose that expression.

Unit 7 - Lesson 16 - Grade 2: Illustrative Mathematics

Unit 7 - Lesson 16 - Grade 2: Illustrative Mathematics

True or False: Equations Based on Place Value (Warm Up)

Jada’s Thinking

Find It Your Way

True or False: Equations Based on Place Value (Warm Up)

Jada’s Thinking

Discuss how Jada’s equations match Lin’s diagram.

Finish Jada’s work to find the value of 582 - 145.

Jada says she knows a way to count on to find the difference. She showed her thinking using a number line.Explain Jada’s thinking.

Jada says you can’t decompose to find the value of because there aren’t any tens. Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show yourthinking.

Find It Your Way

525 - 214

700 - 589

683 - 398

918 - 608

735 - 457

602 - 487

Choose one expression and find the value by subtracting by place.Show your thinking.

Explain why you chose that expression.

Choose a different expression and find the value using a different method. Show your thinking.

Explain why you chose that expression.

2 hundreds + 3 tens + 4 ones = 2 hundreds + 3 tens + 14 ones

2 hundreds + 3 tens + 4 ones = 1 hundred + 13 tens + 4 ones

1 hundred + 13 tens + 4 ones = 1 hundred + 12 tens + 14 ones

Discuss how Jada’s equations match Lin’s diagram.

Finish Jada’s work to find the value of 582 - 145.

Jada says you can’t decompose to find the value of because there aren’t any tens. Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show yourthinking.

525 - 214

700 - 589

683 - 398

918 - 608

735 - 457

602 - 487

Choose one expression and find the value by subtracting by place.Show your thinking.

Explain why you chose that expression.

Choose a different expression and find the value using a different method. Show your thinking.

Explain why you chose that expression.

Jada says she knows a way to count on to find the difference. She showed her thinking using a number line.

Explain Jada’s thinking.

Jada says you can’t decompose to find the value of because there aren’t any tens.

Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show your
thinking.

Choose one expression and find the value by subtracting by place.

Show your thinking.

Choose a different expression and find the value using a different method.

Show your thinking.

2 hundreds + 3 tens + 4 ones =
2 hundreds + 3 tens + 14 ones

2 hundreds + 3 tens + 4 ones =
1 hundred + 13 tens + 4 ones

1 hundred + 13 tens + 4 ones =
1 hundred + 12 tens + 14 ones

Jada says you can’t decompose to find the value of because there aren’t any tens.

Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show your
thinking.

Choose one expression and find the value by subtracting by place.

Show your thinking.

Choose a different expression and find the value using a different method.

Show your thinking.