Amy has a box containing domino pieces but she does not think it is a complete set. Diving in at the Deep End Age 7 to 11 The tasks in this group will give you the opportunity to create some proofs of your own. Strike it Out game for an adult and child. How do you know? You can also solve problems about what happens when we add or subtract different numbers! The Box Game Age 3 to 5 Adding and subtracting. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game. This task offers opportunities to subtract fractions using A4 paper. What could the half time scores have been in these Olympic hockey matches? How many different trains can you make? How could you arrange at least two dice in a stack so that the total of the visible spots is 18? Proof by Logical Argument Age 5 to 11 These tasks are useful contexts in which to explore proof by logical argument.

Can you work out what a, b and c are in this sum?

# Maths Search :

Try nrihc fractions using A4 paper. Calendar Capers Choose any three by three square of dates on a calendar page Making a Difference Age 11 to 14 Challenge Level: Each letter represents a digit and where the same letter appears more than once it must represent the same digit each time. Domino Sorting Age 5 to 7 Challenge Level: What do you notice? An investigation involving adding and subtracting sets of consecutive numbers.

Roll two red dice and a green dice. An environment which simulates working with Cuisenaire rods. Are there some numbers that are good to aim for?

## Problem Solving

What questions would you like to ask? Subtraction Surprise Age 7 to 14 Challenge Level: Use the information about Sally and her brother to find out how many children there are in the Brown family.

Square Subtraction Age 7 to 11 Challenge Level: Are these statements always true, sometimes true or never true? Can you stop your partner from being able to kx2 This article, written for primary teachers, discusses what we mean by ‘problem-solving skills’ and draws attention to NRICH tasks which can help develop specific skills.

Got It Age 7 to 14 Challenge Level: Aisha’s division and subtraction calculations both gave the same answer! Show that for 4 terms there are 5 cases and find the number of cases for 5 terms and 6 terms. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. An investigation involving adding and subtracting sets of consecutive numbers.

What happens with different starting numbers?

Two Dice Age 5 to 7 Challenge Level: Register for our mailing list. Addition and Subtraction KS2 Age 7 to subtraxtion The upper primary tasks in this collection all focus on adding and subtracting. Subtracting to Age 11 to 14 Short Challenge Level: Are you surprised by the results?

How many ways can the terms in an ordered list be combined by repeating a single binary operation. This challenge, written for the Young Mathematicians’ Award, invites you to explore ‘centred squares’. Number Operations and Calculation Methods – Short Problems Age 11 to 16 A collection of short problems on number operations and calculation methods. Ram divided 15 pennies among four small bags. These upper primary tasks all specifically draw on the use of visualising.

Find the Difference Age 5 to 7 Challenge Level: To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.