March 23, 2017
by Lily Jones

Lesson plan

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

(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, 10s, and 1s numbers 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 students’ 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.

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