Two-Digit Addition Without Regrouping Video

Hundreds of people come to this zoo every week. It’s a great place to learn about animals and their habitats. Sean loves animals, but this weekend he is focusing on the amount of people who visit the zoo. He wants to know how many people visit the zoo on Friday, Saturday, and Sunday.

Just as Sean suspected, many people came to visit the zoo on Friday. Sean checked with the ticket booth at lunch time and just before the zoo closed. 33 tickets were sold before lunch and 31 tickets were sold after lunch. Let’s help Sean find the total number of zoo visitors on Friday.

Adding two large numbers like 33 and 31 can be challenging, so it’s helpful if we can rewrite the addition sentence using a place value chart. Place value charts allow us to break numbers apart using their place values, just like this: 33 is equal to 3 tens and 3 ones. Let’s put 3 dots in the ones section and 3 dots in the tens section.

31 is equal to 3 tens and 1 one. Let’s put 1 dot in the ones section and 3 dots in the tens section.

We need to add the dots together, beginning in the ones section. 3 dots plus 1 dot equals 4 dots. Now, the tens section. 3 dots plus 3 dots equals 6 dots.

6 tens and 4 ones in expanded form is 60+4. 60+4=64. 64 people visited the zoo on Friday!

As busy as Friday was, Saturday was even busier at the zoo! Sean checked with the ticket booth. They sold 65 tickets before lunch and 32 tickets after lunch. Let’s help him find the total number of zoo visitors on Saturday.

Remember, before adding two large numbers, look at the place values of each number. 65 is equal to 6 tens and 5 ones. Let’s put 5 dots in the ones section and 6 dots in the tens section.

32 is equal to 3 tens and 2 ones. Let’s put 2 dots in the ones section and 3 dots in the tens section.

To find the total amount of dots, we will first add the ones section and then the tens section. 5 dots plus 2 dots equals 7 dots. 6 dots plus 3 dots equals 9 dots.

What is the expanded form of 9 tens and 7 ones?

Hmmmm, you’re right! 9 tens is 90 and 7 ones is 7. 90 + 7 = 97. 97 people visited the zoo on Saturday!

It’s now Sunday and Sean has just checked with the ticket booth. They sold 44 tickets before lunch and 35 tickets after lunch. How many people visited the zoo on Sunday? Let’s use a place value chart to find out!

Our first addend is 44. How many tens and ones are in the number 44?

Very good! 44 is equal to 4 tens and 4 ones. Let’s put 4 dots in the ones section and 4 dots in the tens section.

How many tens and ones are in the number 35?

You are right! 35 is equal to 3 tens and 5 ones. Let’s put 5 dots in the ones section and 3 dots in the tens section.

Now it’s time to add up the place values! What is 4 + 5?

Correct, 9! What is 4 plus 3?

Yes, 7!

The expanded form of 7 tens and 9 ones is 70 + 9. What is 70 + 9?

That’s right! 70+9=79. 79 people visited the zoo on Sunday!

Thank you for helping Sean add these large numbers together! Now he knows the exact number of visitors at the zoo. What a fun weekend!