\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)

Addition Within 10

What is Adding?


Do you know what happens when you get more toys or candies? You are adding! Let’s see: if you have 4 red cubes and someone gives you 2 more blue cubes, how many cubes do you have now?
\(+\) \(=\)

Now you have 6 cubes! In math, we write it like this: $$4 + 2 = 6$$
\(+\) \(=\)


Definition Addition
Addition means putting things together. When we add, we find how many we have in total.
  • The \(+\) symbol means "add."
  • The \(=\) symbol shows that the two sides are the same.
We can represent addition as:
  • Numbers: $$\textcolor{colordef}{4} + \textcolor{colorprop}{2} = \textcolor{olive}{6}$$
  • Cubes:
    \(+\) \(=\)
  • Fingers:
    \(+\) \(=\)
  • Words: $$\textcolor{colordef}{\text{four }}\text{plus}\textcolor{colorprop}{\text{ two}}\text{ equals }\textcolor{olive}{\text{six}}$$

How to Add?

Method Counting All
If you have 3 apples in a basket, and then you get 2 more apples, how many do you have?
\(+\)\(=\)
  • Count the 3 apples you already have:
    \(+\)\(=\)
    \(+\)\(=\)
    \(+\)\(=\)
  • Add the 2 new apples to the basket:
    \(+\)\(=\)
    \(+\)\(=\)
  • You have 5 apples!
    \(+\)\(=\)
Tip: When there is no drawing, you can always count your fingers to help add the numbers!
\(3+ 2 = 5\)
\(+\) \(=\)
Method Counting On
If you have 7 apples in a basket, and then you get 2 more apples, how many do you have?
\(+\)\(=\)
  • Start with the 7 apples you already have:
    \(+\)\(=\)
  • Add the 2 new apples to the basket:
    \(+\)\(=\)
    \(+\)\(=\)
  • You have 9 apples!
When there’s no drawing, you can always start with 7 fingers on your hand and add 2 more fingers!
\(7+ 2 = 9\)
\(+\) \(=\)

Adding using Number Line

Method Adding using Number Line
We want to find \(3+5\).
  • Place a marker on 3.
  • Move 5 steps forward.
So, \(3 + 5 = 8\).