Adding and Subtracting 3-Digit Numbers
4th Grade•25 minutes
Learning Objective
I can add and subtract three-digit numbers using expanded form to show regrouping.
Key Concepts
When using expanded form for subtraction, you must expand each number into its hundreds, tens, and ones.
In the problem 803 - 147, you must regroup from the hundreds place because there is a zero in the tens place.
After regrouping, 803 becomes 700 + 90 + 13, and the answer to 803 - 147 is 656.
Practice Questions
This lesson includes 3 practice questions to reinforce learning.
View questions preview
1. Solve 528 - 213 using expanded form to show each step.
2. Explain the first step in subtracting 267 from 405 using expanded form, and why regrouping is necessary.
3. What is the value of 682 + 149 using expanded form?
Educational Video
3 Digit Subtraction Expanded Form WITH Regrouping
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