# Adding 2 Digit Numbers Using Standard Algorithm  Rate this video

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## DescriptionAdding 2 Digit Numbers Using Standard Algorithm

### Contents

• How do you add 2 digit numbers using standard algorithm?
• ### How do you add 2 digit numbers using standard algorithm?

#### In this Video

Mr. Squeaks and Imani are participating in a lake clean up contest. Although the real reward is a clean lake, the winner of this contest will be the participant that collects the greatest total weight of trash. In this video, we are shown how to use standard algorithm to solve 2 digit addition without regrouping and 2 digit addition with regrouping. Once we find the totals of all the contestants, we will see who brings home first place. Can Mr. Squeaks do it?

#### Adding Two Digit Numbers Using Standard Algorithm

In this lesson we will learn how to do 2 digit addition using standard algorithm. Standard algorithm is a method to use where the numbers are set up vertically, based on place values. This is an efficient way to find sums when there are several equations you need to solve. There will be examples that have you adding 2 digit numbers without regrouping as well as adding 2 digit numbers with regrouping.

#### Examples of Adding 2 Digit Numbers To solve this 2-digit addition problem, We set the equation up vertically, with one addend on top of the other in order of their place values. We will find the sum of the numbers by adding the digits from right to left, beginning with the ones place. What is six plus two more? Place the eight below the line directly under the ones place. Next, we move one place over to the left and now we add the tens place. How many are three tens and two tens? We can write the digit five below the line under the tens place because the five represents five tens or fifty. The sum is 58. In this problem, we will need to do 2-digit addition with regrouping. We are going to find the sum of fourteen and forty-seven. Starting with the ones place; four plus seven equals eleven. What do you notice about the sum of the ones place? Eleven is a two-digit digit number made up of a one and one ten. So one is written underneath the ones place and one is regrouped ON TOP of the tens place. Now we add the tens, including this new value added at the top. What is the sum of ten,forty and ten? Sixty...so we have six tens. The sum is 61.