# Multi-Digit Subtraction

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## Objective

Students will be able to subtract multi-digit numbers with regrouping.

#### Big Idea

Beg, borrow, steal? I think borrowing is best!

## Activities

150 minutes

Activities

• Introduce Skill
• While preparing myself for teaching/introducing today’s skill I view a short tutorial from Khan Academy.
• I bring the students to area of the room where I can use the whiteboard and they can gather with their whiteboards.
• I introduce their ‘I Can’ statement for today.
• I can subtract multi-digit numbers.
• As a group we go over the skill and practice it on our whiteboards.

• Partner Practice
• Students work with a partner to practice their skill.
• Students play Multi-Digit Subtraction Battle
• Students should be using a three number flip subtract a two number flip.

• Check-In
• The students and I review the worksheet from the previous activity.
• I go over the first few problems with the students.
• Then one at a time I have students take turns explaining the remainder of the problems.

• Interactive Practice
• The students work in groups to practice their skill on an online interactive.

## Assessment

30 minutes

Generally the purpose of classroom computation isn’t quantity, it is quality with a focus on explaining the strategies used and how/why it is true. However, the purpose of targeted skills practice includes fluency, as well as additional review to build comprehension.  I am looking for the student to demonstrate their fluency on this skill by completing the assessment with very few errors and within a reasonable amount of time.  The assessment is meant to be completed in approximately 15 minutes.