Guided Lessons

# Break It Down

What exactly does the number 97 mean? How about 454? In this lesson, students explore how two-digit numbers are made up of tens and ones. Then they use this understanding to subtract numbers within 1000.
Need extra help for EL students? Try the Think About What Went Wrong! pre-lesson.

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Need extra help for EL students? Try the Think About What Went Wrong! pre-lesson.

Students will be able to subtract three-digit numbers using place value blocks.

The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.
(5 minutes)
• Show students the place value blocks.
• Say, “These blocks show 100, 10, and 1. We can use these blocks to represent how many hundreds, tens, and ones we have.”
(10 minutes)
• Write the number 394 on the board.
• Say, “If you want to use place value blocks to represent this number, you would use three hundreds, nine tens, and four ones.”
• Now write 394 – 293 = ____ on the board. Say, “Let’s subtract 293 from 394. That means we have to take away one hundred, nine tens, and three ones.”
• Show how to subtract 293 from 394 using place value blocks.
• Now write 394 – 293 = 101 on the board.
(10 minutes)
• Hand out place value blocks to the students.
• Write the number 539 on the board. Have students work in pairs to represent 539 with place value blocks.
• Now tell students to subtract 323 from 539.
• Have students share their answers with the class.
(15 minutes)
• Pass out the Place Value Blocks worksheet.
• Have students work independently to solve the problems.

Enrichment: Have students work with place value blocks to create and solve additional three-digit subtraction problems.

Support: Have students work with real place value blocks when solving the problems on the worksheet.

(5 minutes)
• Assess student understanding by observing how they solve the problems on the worksheet.
• Have students share their answers with the same partners they worked with during the guided practice section of the lesson and listen in to assess understanding.
(5 minutes)
• Have students share their strategies for solving the problems on the worksheet.