Number bonds to 20: counting worksheets and number bonds for kindergarten

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This is only 5 pairs of numbers. If we remember these, then we can remember the number bonds to 20. This Number Bonds of 20 Activity will engage your class to improve their addition and subtraction Maths sums. The fun robot theme makes learning number bonds more exciting because once they have finished and got all the questions right, why not let them colour the robots in to showcase their work. Number bonds like times tables are something which a child should know instantly without needing to think - therefore lots of practice by play and worksheets are essential to memorise these number relationships.

Add and subtract numbers using concrete objects, pictorial representations, and mentally, including: a two-digit number and ones; a two-digit number and tens; two two-digit numbers; adding three one-digit numbers

Number bonds require practise to learn and memorise. We recommend using our online number bonds to 20 activity to help learn them. These Number Bonds Worksheets are great for testing children in their ability to solve number bonds problems for a given sum. A number bond is a mental picture of the relationship between a number and the parts that combine to make it. The concept of number bonds is very basic, an important foundation for understanding how numbers work. A whole thing is made up of parts. If you know the parts, you can put them together (add) to find the whole. If you know the whole and one of the parts, you take away the part you know (subtract) to find the other part. Number bond activities will help your students to improve mental maths skills, addition, and they can build their confidence with 2 and 3-digit numbers. When teaching number bonds to 20, it is useful to point out the pattern of increasing and decreasing numbers.

Removing the ‘1’ tens digit from the number bonds to 20, we can see that we are left with the number bonds to 10. We can show the number bonds to 20 with a visual aid in the form of counters or cubes. This is a useful practical activity for introducing the number bonds and showing the number size and decomposition. For even more exciting activities, take a look at the Number Bonds to 10 Activity Booklet or the Jungle Maths Number Bonds to 20 Game. Number bonds let children see the inverse relationship between addition and subtraction. Subtraction is not a totally different thing from addition; they are mirror images. To subtract means to figure out how much more you would have to add to get the whole thing.

What are number bonds?

Alternatively, we have part part whole model worksheets. The part part whole teaching model is made up of three circles. The larger number goes in the largest circle and two smaller circles contain the two numbers that add to make this number.