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

Lesson: Subtract Within 1,000

Cool Down: Find the Difference Your Way

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.

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

Jada’s Thinking

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

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

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

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

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.

525 - 214

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)

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

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

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

Explain why you chose that expression.

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

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’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 = 1 hundred + 13 tens + 4 ones

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

700 - 589

683 - 398

918 - 608

735 - 457

602 - 487

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

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.

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 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 =
1 hundred + 13 tens + 4 ones

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

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

Show your thinking.