## NRICH SUBTRACTION PROBLEM SOLVING KS2

Number Squares Age 5 to 11 Challenge Level: This challenge, written for the Young Mathematicians’ Award, invites you to explore ‘centred squares’. Plenty of Pens Age 7 to 11 Challenge Level: Addition and Subtraction KS2. Annie and Ben are playing a game with a calculator. Same Answer Age 11 to 14 Challenge Level:

A game for 2 players. Addition and Subtraction Try these activities which all involve addition and subtraction. What could the half time scores have been in these Olympic hockey matches? This project challenges you to work out the number of cubes hidden under a cloth. Weighted Numbers Age 5 to 7 Challenge Level: In this square, look at the green square which contains the numbers 2, 3, 12 and

Four bags contain a large number of 1s, 3s, 5s and 7s. What are all the different possible kw2 Number Differences Age 7 to 11 Challenge Level: Number Detective Follow the clues to find the mystery number. Number Games Age 5 to 11 Challenge Level: How could you sort the cards? The idea is to go round the track in as few jumps as possible.

This challenge, written for the Young Mathematicians’ Award, invites you to explore ‘centred squares’. Register for our mailing list.

# Subtraction Surprise :

Dicey Addition Age 5 to 11 Challenge Level: How many different ways can you do this? Maisy Goes Camping Age 3 to 5 Using everyday language to talk about addition and subtraction. Can you discover its value in each problem? Addition and Subtraction KS2 Age 7 to 11 The upper primary tasks in this collection all focus on adding and subtracting.

Add the two numbers on the red dice and take away the number on the green.

## Addition and Subtraction KS1

Register for our mailing list. This feature gathers together activities which will help you get better at knowing and using number facts.

Add the two numbers on the red dice and take away the number on the green. How do you know whether you will reach these numbers when you count in steps of six from zero? Can you estimate what the size of the last four solvingg will be?

## Subtraction Surprise

What do you think? This challenge, written for the Young Mathematicians’ Award, invites you to explore ‘centred squares’.

Countdown Age 7 to 14 Challenge Level: How many different differences can you make? The article provides a summary of the elementary ideas about vectors usually met in school mathematics, describes what vectors are and how to add, subtract and multiply them by scalars and indicates.

Investigate the total number of sweets received by people sitting in different positions. Is the number you’re left with odd or even?

Addition and Subtraction Try these activities which all involve addition and subtraction. Number Operations and Calculation Methods – Short Problems Age 11 to 16 A collection of short problems on number operations and calculation methods. Annie and Ben are playing a game with a calculator. Journeys in Numberland Age 7 to 11 Challenge Level: Half Time Age 5 to xolving Challenge Level: What is the value of YxO? Ram divided 15 pennies among four small bags.

When my number is divided by 5 the remainder is 4. Roll two red dice and a green dice.