Adding Doubles

In math adding doubles plays an important role for the kids to know addition facts. This activity increases the math skills in adding the numbers. Adding a number with the same number makes the addition doubles.

Memorize the following table based on adding doubles:

Adding Doubles

Note: Take the print out of this table based on adding doubles and hang on the wall or make small pieces of cards so that kids can easily learn the addition facts on doubles.

How adding doubles is same as multiplying by two?

Learn the two actions which are similar in both the ways because when we multiply a number by 2 we are just doubling the number being multiplied by two.

Consider the following numbers in both the ways in doubling and multiplying by 2 from 0 - 10:

zero plus zero = zero OR 2 × 0 = 0

one plus one = two OR 2 × 1 = 2

two plus two = four OR 2 × 2 = 4

three plus three = six OR 2 × 3 = 6

four plus four = eight OR 2 × 4 = 8

five plus five = ten OR 2 × 5 = 10

six plus six = twelve OR 2 × 6 = 12

seven plus seven = fourteen OR 2 × 7 = 14

eight plus eight = sixteen OR 2 × 8 = 16

nine plus nine = eighteen OR 2 × 9 = 18

ten plus ten = twenty OR 2 × 10 = 20


Numbers from 11 to 20:

eleven plus eleven = twenty two OR 2 × 11 = 22

twelve plus twelve = twenty four OR 2 × 12 = 24

thirteen plus thirteen = twenty six OR 2 × 13 = 26

fourteen plus fourteen = twenty eight OR 2 × 14 = 28

fifteen plus fifteen = thirty OR 2 × 15 = 30

sixteen plus sixteen = thirty two OR 2 × 16 = 32

seventeen plus seventeen = thirty four OR 2 × 17 = 34

eighteen plus eighteen = thirty six OR 2 × 18 = 36

nineteen plus nineteen = thirty eight OR 2 × 19 = 38

twenty plus twenty = forty OR 2 × 20 = 40


Numbers from 21 to 25:

twenty one plus twenty one = forty two OR 2 × 21 = 42

twenty two plus twenty two = forty four OR 2 × 22 = 44

twenty three plus twenty three = forty six OR 2 × 23 = 46

twenty four plus twenty four = forty eight OR 2 × 24 = 48

twenty five plus twenty five = fifty OR 2 × 25 = 50


Children can memorize the numbers adding doubles up to 25 so that they can increase the skills in adding the numbers orally and can score good marks in mental math.

You might like these





First Grade Math Activities

From Adding Doubles to HOME PAGE




Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.




Share this page: What’s this?

Recent Articles

  1. Worksheet on Area, Perimeter and Volume | Square, Rectangle, Cube,Cubo

    Jul 25, 25 12:21 PM

    In this worksheet on area perimeter and volume you will get different types of questions on find the perimeter of a rectangle, find the perimeter of a square, find the area of a rectangle, find the ar…

    Read More

  2. Worksheet on Volume of a Cube and Cuboid |The Volume of a RectangleBox

    Jul 25, 25 03:15 AM

    Volume of a Cube and Cuboid
    We will practice the questions given in the worksheet on volume of a cube and cuboid. We know the volume of an object is the amount of space occupied by the object.1. Fill in the blanks:

    Read More

  3. Volume of a Cuboid | Volume of Cuboid Formula | How to Find the Volume

    Jul 24, 25 03:46 PM

    Volume of Cuboid
    Cuboid is a solid box whose every surface is a rectangle of same area or different areas. A cuboid will have a length, breadth and height. Hence we can conclude that volume is 3 dimensional. To measur…

    Read More

  4. Volume of a Cube | How to Calculate the Volume of a Cube? | Examples

    Jul 23, 25 11:37 AM

    Volume of a Cube
    A cube is a solid box whose every surface is a square of same area. Take an empty box with open top in the shape of a cube whose each edge is 2 cm. Now fit cubes of edges 1 cm in it. From the figure i…

    Read More

  5. 5th Grade Volume | Units of Volume | Measurement of Volume|Cubic Units

    Jul 20, 25 10:22 AM

    Cubes in Cuboid
    Volume is the amount of space enclosed by an object or shape, how much 3-dimensional space (length, height, and width) it occupies. A flat shape like triangle, square and rectangle occupies surface on…

    Read More