# Adding by 2

## Overview

When you join or add groups of objects **together**, you can find how many there are in **all**.

Sometimes we have a group of objects and we want to **add exactly two more** objects to that group.

For example:

We can **ADD** them by joining the two amounts together.

This will give us the **total** number of circles.

When we **ADD** 4 plus 2, we have 6 in **all**.

We say: FOUR plus TWO equals SIX.

We write it like this:

4 + 2 = 6

**Here’s another example.**

In this problem, we are joining together two groups of **crayons**.

We are ADDING them together.

This will give us the total number of crayons.

When we **ADD** 3 plus 2, we have 5 in **all**.

We say: THREE plus TWO equals FIVE.

We write it like this:

3 + 2 = 5

**This time, we are joining the numbers 5 and 2.**

These numbers are known as ADDENDS.

Addends are the amounts that will be joined together.

This problem reads as 5 + 2 = 7.

When the ADDEND 5 is joined with the ADDEND 2, we get a SUM of 7.

When we add TWO MORE to a group of objects, we can remember that the SUM will be the number that comes two after that number when we are counting.

1 + 2 =

For example, 1 + 2 = 3. We also know that when we count, the number that comes two after 1 is the number 3. We can say: ONE… TWO, THREE. We have counted up TWO to get to the number THREE. This can help us to add quickly and correctly when adding 2 to a group.

10 + 2 =

Let’s try another example. What is 10 + 2? We can add or count two more from the number 10. We know that the number that comes after 10 is the number 11 and that the number that comes after 11 is the number 12. Therefore, 10 + 2 = 12.

2 + 8 =

Here is another example. This time our 2 comes first and our larger group comes second. We can still solve in the same way. What is 2 + 8? We can **add** or **count** **on** two more from the number 8. We know that the number that comes after 8 is the number 9, and that the number that comes after 9 is the number 10.

Therefore,

2 + 8 = 10

Look at the example above. Two groups are being joined together to find the total.

7 turtles plus 2 turtles will tell us how many turtles there are in all.

When we count, we know that the number that comes after 7 is 8, and that the number that comes after 8 is 9.

Therefore,

7 + 2 = 9 turtles.

**There are 9 turtles in all.**

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Let’s use a word problem as an example.

**THREE** bananas are joined with **TWO** cherries and this will give us the correct **SUM**.

We can count up two from three to help us find the answer.

**3 + 2 = 5 in all**

### Practice Question 1

**Write the addition sentence and solve the problem below.**

### Practice Question 2

**Let’s try another! Write the addition sentence and solve the problem below.**

### Practice Question 3

**Take a look at the math sentence below. Draw a picture to match it. Then solve.**

9 + 2 =

### Practice Question 4

**Look at the groups below.**

**How many pieces of candy are there in all?**

**Write an addition sentence and solve.**

[answer=4

### Practice Question 5

**Look at the groups below.**

**How many children are there in all?**

**Write an addition sentence and solve.**

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