Adding and Understanding Sums

This video tutorial teaches how to add three-digit numbers using simple strategies. It begins with an introduction to the concept, followed by three detailed examples: adding 233 and 421, 520 and 143, and 834 and 151. Each example uses a place value chart and base 10 blocks to illustrate the process. The video also includes a practice problem for viewers to solve independently. The tutorial concludes with encouragement to continue practicing and mastering the skill of adding three-digit numbers.

What is the first step in adding three-digit numbers?

• Line up the numbers randomly

• Add the ones place first

• Begin with the tens place

• Start with the hundreds place

In the example of adding 233 and 421, what is the sum of the ones place?

• 7

• 6

• 5

• 4

What is the total when you add the tens place in 233 and 421?

• 7

• 6

• 8

• 5

What is the sum of 233 and 421?

• 654

• 657

• 655

• 656

When adding 520 and 143, what is the sum of the tens place?

• 7

• 8

• 6

• 5

What is the result of adding 520 and 143?

• 662

• 663

• 664

• 665

In the example of 834 and 151, what is the sum of the ones place?

• 6

• 5

• 7

• 4

What is the total of the tens place when adding 834 and 151?

• 10

• 9

• 8

• 7

What is the sum of 834 and 151?

• 987

• 984

• 986

• 985

What is the first step when solving 376 + 212 on your own?

• Add the tens place

• Add the hundreds place

• Add the ones place

• Line up the numbers