Other tags that relate to How Many Eggs?
Introducing algebra. Combinations. Addition & subtraction. Trial and improvement. Investigations. Multiplication & division. Working systematically. Factors and multiples. Generalising. Place value.There are 91 results
Broad Topics > The Number System and Place Value > Place value
Spell by Numbers
Age 7 to 11
Challenge Level
Can you substitute numbers for the letters in these sums?
Trebling
Age 7 to 11
Challenge Level
Can you replace the letters with numbers? Is there only one solution in each case?
Being Resilient - Primary Number
Age 5 to 11
Challenge Level
Number problems at primary level that may require resilience.
Place Value as a Building Block for Developing Fluency in the Calculation Process
Age 5 to 11
This article for primary teachers encourages exploration of two fundamental ideas, exchange and 'unitising', which will help children become more fluent when calculating.
Napier's Bones
Age 7 to 11
Challenge Level
The Scot, John Napier, invented these strips about 400 years ago to help calculate multiplication and division. Can you work out how to use Napier's bones to find the answer to these multiplications?
ABC
Age 7 to 11
Challenge Level
In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?
Being Resourceful - Primary Number
Age 5 to 11
Challenge Level
Number problems at primary level that require careful consideration.
One Million to Seven
Age 7 to 11
Challenge Level
Start by putting one million (1 000 000) into the display of your calculator. Can you reduce this to 7 using just the 7 key and add, subtract, multiply, divide and equals as many times as you like?
Six Is the Sum
Age 7 to 11
Challenge Level
What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?
Multiply Multiples 1
Age 7 to 11
Challenge Level
Can you complete this calculation by filling in the missing numbers? In how many different ways can you do it?
Multiply Multiples 2
Age 7 to 11
Challenge Level
Can you work out some different ways to balance this equation?
Alien Counting
Age 7 to 11
Challenge Level
Investigate the different ways these aliens count in this challenge. You could start by thinking about how each of them would write our number 7.
Oddly
Age 7 to 11
Challenge Level
Find the sum of all three-digit numbers each of whose digits is odd.
Being Collaborative - Primary Number
Age 5 to 11
Challenge Level
Number problems at primary level to work on with others.
All the Digits
Age 7 to 11
Challenge Level
This multiplication uses each of the digits 0 - 9 once and once only. Using the information given, can you replace the stars in the calculation with figures?
Multiply Multiples 3
Age 7 to 11
Challenge Level
Have a go at balancing this equation. Can you find different ways of doing it?
Digit Addition
Age 5 to 11
Challenge Level
Try out this number trick. What happens with different starting numbers? What do you notice?
Song Book
Age 7 to 11
Challenge Level
A school song book contains 700 songs. The numbers of the songs are displayed by combining special small single-digit cards. What is the minimum number of small cards that is needed?
Arrange the Digits
Age 11 to 14
Challenge Level
Can you arrange the digits 1,2,3,4,5,6,7,8,9 into three 3-digit numbers such that their total is close to 1500?
Round the Three Dice
Age 7 to 11
Challenge Level
What happens when you round these three-digit numbers to the nearest 100?
Journeys on the Gattegno Tens Chart
Age 5 to 11
Alf describes how the Gattegno chart helped a class of 7-9 year olds gain an awareness of place value and of the inverse relationship between multiplication and division.
Diagonal Sums
Age 7 to 14
Challenge Level
In this 100 square, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?
Please Explain
Age 11 to 14
Challenge Level
Visitors to Earth from the distant planet of Zub-Zorna were amazed when they found out that when the digits in this multiplication were reversed, the answer was the same! Find a way to explain. . . .
Coded Hundred Square
Age 7 to 11
Challenge Level
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
Add to 200
Age 11 to 14
Challenge Level
By selecting digits for an addition grid, what targets can you make?
The Thousands Game
Age 7 to 11
Challenge Level
Each child in Class 3 took four numbers out of the bag. Who had made the highest even number?
Round the Dice Decimals 1
Age 7 to 11
Challenge Level
Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?
Round the Dice Decimals 2
Age 7 to 11
Challenge Level
What happens when you round these numbers to the nearest whole number?
Football Sum
Age 11 to 14
Challenge Level
Find the values of the nine letters in the sum: FOOT + BALL = GAME
How Can I Support the Development of Early Number Sense and Place Value?
Age 3 to 11
This article for primary teachers expands on the key ideas which underpin early number sense and place value, and suggests activities to support learners as they get to grips with these ideas.
Activities on the Gattegno Chart
Age 5 to 11
In this article, Alf outlines six activities using the Gattegno chart, which help to develop understanding of place value, multiplication and division.
Place Value: the Ten-ness of Ten
Age 3 to 11
This article develops the idea of 'ten-ness' as an important element of place value.
Position
Age 5 to 11
One of the key ideas associated with place value is that the position of a digit affects its value. These activities support children in understanding this idea.
Amount
Age 5 to 11
These tasks will help learners develop their understanding of place value, particularly giving them opportunities to express numbers as amounts.
Number Sense and Place Value
Age 5 to 11
This feature aims to support you in developing children's early number sense and understanding of place value.
More Upper Primary Activities on Number Sense and Place Value
Age 7 to 11
More upper primary number sense and place value tasks.
Nice or Nasty for Two
Age 7 to 14
Challenge Level
Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.
Forwards Add Backwards
Age 11 to 14
Challenge Level
What happens when you add a three digit number to its reverse?
Nice or Nasty
Age 7 to 14
Challenge Level
There are nasty versions of this dice game but we'll start with the nice ones...
Subtraction Surprise
Age 7 to 14
Challenge Level
Try out some calculations. Are you surprised by the results?
Less Is More
Age 5 to 11
Challenge Level
Use your knowledge of place value to try to win this game. How will you maximise your score?
Which Is Quicker?
Age 7 to 11
Challenge Level
Which is quicker, counting up to 30 in ones or counting up to 300 in tens? Why?
What Do You Need?
Age 7 to 11
Challenge Level
Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?
That Number Square!
Age 5 to 11
Challenge Level
Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?
Two and Two
Age 11 to 16
Challenge Level
How many solutions can you find to this sum? Each of the different letters stands for a different number.
Tis Unique
Age 11 to 14
Challenge Level
This addition sum uses all ten digits 0, 1, 2...9 exactly once. Find the sum and show that the one you give is the only possibility.
Calculator Bingo
Age 7 to 11
Challenge Level
This is a game for two players. What must you subtract to remove the rolled digit from your number? The first to zero wins!
NRICH is part of the family of activities in the Millennium Mathematics Project.