Explaining Addition Number Sentences in Multiple Ways

This video tutorial teaches how to solve addition problems using two methods: expanded form and number line. The instructor demonstrates how to break down numbers into hundreds, tens, and ones to find the sum. The lesson includes examples of solving the addition problem 654 + 150 using both methods, ensuring the correct answer of 804 is reached. The tutorial emphasizes understanding addition through different approaches.

What are the steps taken to verify that 654 + 150 equals 804 using two different methods?

In your own words, explain why it is important to find the answer to an addition number sentence in more than one way.