Adding Multi-Digit Whole Numbers Using Partial Sums

This video tutorial teaches how to add multi-digit whole numbers using expanded form and partial sums. It begins with an introduction to expanded form and the importance of place value. The tutorial then provides a detailed example of adding 45,238 and 35,987 using expanded form, followed by a second example using mental math to add 32,256 and 25,478. The lesson emphasizes understanding place value and using partial sums for efficient addition.

How do you determine the value of each digit based on its place in a number?

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What was the final answer when adding 45,238 and 35,987?

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