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Unit 7 - Lesson 2 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 7
Lesson 2: Add and Subtract with Tens and Hundreds
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 2: Add and Subtract with Tens and Hundreds
CC BY 2021 Illustrative Mathematics®
Lesson: Add and Subtract with Tens and Hundreds

Number Talk: Add Multiples of 10 (Warm Up)

Find the value of each expression mentally.

Show It with Base-ten Blocks

Use your base-ten blocks to show each number. Then, roll a number cube to see how many tens or hundreds to add or subtract.
Show 297.

Add _______ hundreds.

Complete the equation:
297 +_______ =_______
Show 432.

Add _______ tens.
432 + _______ = _______
Show 982.

Subtract _______ tens.
982 - _______ = _______
Show 351.

Add _______ hundreds.

Show 351.

Write an equation:

Show 805.

Subtract _______ hundreds.

Show 805.

Write an equation:

How Many with Base-ten Blocks and Equations

Mai has 2 hundreds, 2 tens, and 3 ones. Lin has 4 hundreds.

Represent their values with base-ten blocks or diagrams.

What is the value of their blocks altogether? Show your thinking.

Andre has 4 hundreds, 2 tens, and 8 ones.

Represent his value with base-ten blocks or diagrams.

Andre gives 2 hundreds to Clare.

What is the value of his blocks now? Show your thinking.

Diego has 6 tens. Tyler has 8 hundreds, 3 tens, and 6 ones.

What is the value of their blocks together? Show your thinking.

Elena has 5 hundreds, 7 tens, and 2 ones. She gives 2 tens to Kiran.

What is the value of her blocks now? Show your thinking.

Priya has 6 hundreds, 5 tens, and 8 ones. Han gives her 3 hundreds.

What is the value of her blocks now? Show your thinking.

Jada has 4 hundreds, 8 tens, and 2 ones. She gives 3 hundreds to Noah.

What is the value of her blocks now? Show your thinking.

Cool Down: How Many Blocks?

What is the value of their blocks altogether?

Write an equation to show your thinking.