Doubles to 20 Worksheet for Class 2

A doubles to 20 worksheet for Class 2 gives children focused practice adding two equal numbers. In this activity, learners solve examples such as double 3 and double 9, complete a missing answer, and match several doubles facts with their totals. The visible set includes double 1, double 3, double 4 and double 6, so children can connect the phrase double a number with an addition sentence such as 6 + 6.

What adding the same number means

A double has two equal addends. Double 3 means 3 + 3, and its total is 6. Double 9 means 9 + 9, and its total is 18. The word double is not a signal to add 2 or write the digit twice. It tells the child to make two equal groups of that number and combine them.

Examples of equal addends

Doubles phrase	Addition sentence	Total
Double 1	1 + 1	2
Double 3	3 + 3	6
Double 4	4 + 4	8
Double 6	6 + 6	12
Double 9	9 + 9	18

This relationship is the core of add same numbers up to 20 practice.

Examples visible in this activity

The first multiple-choice item shows Double 3 with the choices 9 and 6. Six is correct because 3 + 3 = 6. Nine would be the result of 3 + 3 + 3, which uses three equal addends rather than a double.

A fill-in item asks for double 9. The child can write 9 + 9 and find 18. Matching sections pair facts with results. The visible choices show that double 1 connects to 2, double 3 to 6, double 4 to 8, and double 6 to 12.

Say the fact in three ways

Practise double 4, 4 plus 4, and two groups of 4. Using all three phrases helps a child recognise the same relationship when the question format changes.

A reliable strategy for a doubles fact

Read the number after the word double.
Write that number twice with a plus sign between the copies.
Build two equal groups with counters or fingers if needed.
Count the combined total once.
Check that both groups began equal.
State the full fact aloud.

For double 6, a child writes 6 + 6. They may count six objects in each group, then combine to reach 12. The final spoken fact is, Double 6 is 12.

From models to quick recall

Concrete objects are useful when a doubles fact is new. After the child understands two equal groups, encourage more efficient patterns. Double 5 is two hands of five. Double 6 is one more in each group than double 5, so the total is two more than 10. Double 9 is one less in each group than double 10, so the total is two less than 20.

These comparisons support number sense without forcing speed. Accurate thinking comes before quick recall. A child who forgets a fact can rebuild it from a known neighbour instead of guessing.

Parent practice for doubles within 20

Use pairs found at home: two plates with four grapes each, two hands with five fingers each, or two rows of three buttons. Ask three questions: Are the groups equal? What is the double? What is the total?

Begin with double 1 through double 5.
Add one new fact only after earlier facts are secure.
Let the child write the addition sentence.
Mix spoken, written and matching questions.
End with one fact the child knows confidently.

Do not time early practice. If a response is slow, ask the child to show two equal groups and reason from them.

Teacher guidance for matching tasks

Before children drag answers, read all facts and totals aloud. Encourage them to solve each fact separately rather than matching by visual position. A simple recording grid can hold the fact and total while the child works.

Model double 1 with two single counters.
Ask pairs to explain why double 3 cannot be 9.
Sort fact cards into totals below 10 and totals of 10 or more.
Use known facts to derive a neighbouring double.
Check that learners understand equal addends, not just memorised answers.

If several children reverse a match, return to the addition sentence. The structure 4 + 4 is easier to verify than an isolated claim that double 4 is 8.

Common mistakes with equal addends

Adding 2 to the number: rewrite double 6 as 6 + 6, not 6 + 2.
Using three copies: point out that a double always has two equal groups.
Writing 33 for double 3: distinguish joining digits from adding quantities.
Matching by shape or order: solve the fact before moving an answer.
Counting one group only: touch every object across both groups.
Forgetting totals above 10: use a ten and extra ones to represent 12, 14, 16 or 18.

Short games for doubles facts

Mirror counters

Place counters on one side of a line. The child mirrors the same number on the other side and finds the total.

Doubles memory pairs

Match a card saying double 7 with a card showing 14. Keep the set small enough for accurate explanations.

Neighbour fact talk

If double 5 is 10, ask how double 6 changes. Adding one to each equal group increases the total by 2.

Call and respond

Say an addition sentence such as 8 + 8. The child responds with double 8 and the total 16.

Doubles can support near-doubles addition, even-number patterns and fact families. For example, 6 + 7 is one more than double 6. These are later connections. The selected activity remains centred on exact equal-addend facts with totals no greater than 18 in the visible examples.