Quick fire questions on number bonds, doubling, halving, times tables, division facts and square numbers against the clock. Brilliant for improving mental maths and calculation skills.

Can you meet the challenge to see how many subtraction calculations you can do in two minutes? There are different levels and you can choose either one or two missing numbers to make your number sentence correct. Tablet-friendly.

Can you find all the number fact families? Just the thing for learning the relationship between addition/subtraction and multiplication/division. Challenging level with negative numbers.

A versatile way of generating random numbers which is excellent for use right through the primary school. Spin the numbers and choose the required calculation. Great for starter and plenary sessions. It also provides the answers to the calculations.

A clever resource which is great for demonstrating inverse operations. Click on the words to see the sums. Useful for mental maths starters or plenaries.

A useful teacher demonstration tool for demonstrating how units or tens are regrouped in addition sums with carrying.

A teaching tool which demonstrates expanded addition of large numbers including decimals.

Excellent for whole class addition mental maths. Levels are progressive from single digit addition to decimal addition and HTU and TU addition. It usefully presents sums in different ways.

Use the image of a dartboard to reinforce addition. You can choose to reveal or input the answers.

Make each row and column add up to the magic number provided.

An excellent site for addition, subtraction, multiplication and division practice. Good for learning your times tables. Also it is a useful tool for teachers to demonstrate balancing simple equations.

A good demonstration tool for showing how TU and HTU mental addition can be made easier through the use of place value cards.

Excellent for demonstrating addition with carrying. Enter your own numbers but it handles up to 4 digit numbers.

A great tool for teaching finding the difference between two numbers. Useful for showing counting on for bridging tens and up to near multiples of decimals.

The single step function machine adds or subtracts numbers to 10 or you can set your own function. There is also a more difficult 2 step function machine for more challenging examples.

This website is designed to demonstrate subtraction by the decomposition method. It expands the numbers to aid understanding. Different levels of difficulty including decimals.

A great teaching tool for demonstrating how addition and multiplication squares work.

An interactive whiteboard resource which is useful for teaching the comparison of positive and negative numbers on a number line.

Using the image of a dartboard this site is a great teaching tool for teaching and learning number bonds to 100 and 1000 and also multiples of 5 and 10. It also includes decimal number bonds.