Mental Maths Worksheets for Class 2 with Online Activities

Mental Maths Worksheets for Class 2 Addition Subtraction and Number Facts

These mental maths worksheets for Class 2 help children find sums, differences and missing numbers using known facts. The main focus is addition and subtraction, supported by number bonds, doubles, friendly tens and simple reasoning. The models make the strategy visible before children try describing or using it mentally.

What Is Mental Maths?

Mental maths means working with numbers in your head using facts and relationships you understand. It does not have to mean rushing. A child who explains why a method works is developing a useful skill even when the answer takes a little time.

Use pictures and counters while learning a strategy. Gradually reduce the support as confidence grows. The same question can often be solved by more than one sensible method.

Number Bonds to 10 and 20

A number bond separates a total into parts. Seven and three make ten. Thirteen and seven make twenty. If the whole and one part are known, the other part can be found by thinking about what is missing.

For 7 + □ = 10, the missing number is three. Check the completed sentence by combining both parts. A zero part is also valid: ten and zero still make ten.

Doubles and Near Doubles

A double adds a number to itself. Double six is twelve because 6 + 6 = 12. A near double uses a nearby known double. For 6 + 7, double six and add one, giving thirteen.

The matching-pair game adds one counter to each side at the same time. Every press adds two counters altogether, keeping the two groups equal.

Make the Next Ten

For 27 + 5, split the five into three and two. Add three to reach thirty, then add the remaining two. The result is thirty-two.

Splitting the second addend does not create extra value. Three and two still make the original five. The Bridge to the Next Ten game asks you to stop the first part exactly at a whole ten.

Adding Nine by Adding Ten

Nine is one less than ten. To add nine to thirty-six, add ten to get forty-six, then subtract one to get forty-five.

The correction matters. Stopping after adding ten gives an answer one too large. The workshop lets you perform and undo both steps.

Subtracting Nine by Subtracting Ten

To subtract nine from forty-five, subtract ten first, giving thirty-five. Then add one back because you removed one too many. The answer is thirty-six.

Compare the direction of the adjustment in the add-nine and subtract-nine methods. Adding ten needs a correction down by one; subtracting ten needs a correction up by one.

Choose a Friendly Pair in Three-Number Addition

In 8 + 5 + 2, the eight and two make ten. Combine that pair first, then add five to get fifteen. Addition allows the addends to be regrouped without changing their total.

Do not use that rule to rearrange a subtraction expression freely. Subtraction depends on order. For example, 12 − 5 and 5 − 12 do not describe the same calculation.

Counting Up to Find a Difference

The difference between twenty-seven and thirty-two is five. Count up from twenty-seven to thirty, a change of three, and then to thirty-two, a change of two. Three plus two gives five.

Count the increase, not the number of printed starting points. A whole-ten jump can make the route easier to track.

Missing Numbers in Addition and Subtraction

A missing number can appear in different positions. In □ + 8 = 15, it is seven. In 18 − □ = 11, it is seven. In □ − 6 = 13, it is nineteen.

Think about the relationship between the quantities rather than applying the same subtraction to every blank. Substitute the answer into the original sentence to check it.

Comparing Two Calculations

The expressions 26 + 7 and 27 + 6 both equal thirty-three. One addend increases by one while the other decreases by one, keeping the total unchanged.

Use = when both sides have equal value, > when the left is greater and < when the left is smaller. The equals sign describes a relationship between values, not just a place where an answer goes.

Class 2 Mental Maths Questions with Solutions

Building Confidence without Rushing

Choose a small set of questions and ask which fact helped. Discuss a mistake, revisit its model and try a related example. Accuracy, explanation and flexible thinking provide a stronger foundation than guessing quickly.

The quiz has the usual timer, while the games can be explored without a countdown. Optional audio reads the visible question; all essential information remains on screen.

Addition, subtraction, number bonds, doubles, near doubles, missing numbers and reasoning about number relationships.

No. Understanding useful facts and explaining a strategy are important. The games are untimed.

They are parts that combine to make a whole. Seven and three make ten, while thirteen and seven make twenty.

A known double can support a nearby sum. Six plus seven is double six plus one, which is thirteen.

Add ten and then subtract one. For example, thirty-six plus nine is forty-five.

Subtract ten and add one back. Forty-five minus nine is thirty-six.

Split an addend so that the first part reaches the next multiple of ten. Add the remaining part afterwards.

Yes. The increase from the smaller number to the larger gives their difference.

Yes. Work from the relationship between the parts and whole, then check by substitution.

Yes. Twelve can be seven plus five or eight plus four. Simply swapping a pair is not a new pair in the two-plan activity.

The main focus of this page is mental addition and subtraction. Related worksheets provide separate multiplication and division practice.

The models use large number cards and responsive counter frames. Long explanations are collapsed under Tap to Read. Audio controls are separate from the quiz question.