**"Subtraction"**

## Years 4 – 7 Target Subtraction

*By toni On 2 January, 2018 · Leave a Comment*

This is another TARGET game for the whole class to play as a lesson starter.

You will need a 0 to 9 spinner or dice. Click here for a template and instructions for making spinners. Alternatively the game can be played by pairs of learners and they will […]

## Years 5 – 9 Magic Numbers

*By toni On 5 November, 2017 · Leave a Comment*

What patterns do you see in them?

Suppose you have to share 9872 gold coins between 8 people.

You give the coins out in thousands until there are less than 8000 left.

Then you give out one hundred at a time until there are less than 800, then […]

## Years 4 – 7 Digit Detective

*By toni On 27 October, 2017 · Leave a Comment*

You are a detective and you have to discover what digits the question marks stand for. They can be any digit from 0 to 9 and they can be the same digit or different digits.

How will you find the missing digits?

What do you notice?

How many solutions are there to the calculations?

What clues […]

## Years 5 – 8 Twelfths

*By toni On 13 October, 2017 · Leave a Comment*

Write the number of twelfths for each fraction to match the colours. Three of the answers are filled in.

The answer to one of these calculations is and the other is . Match one of the pictures to each calculation.

Now for the big challenge. […]

## Grades 7 to 9 Up Down Game

*By toni On 12 October, 2017 · Leave a Comment*

This is a game for two players, a group of 3 or 4 players, or for the whole class. You will need to download and cut out or otherwise make 2 sets of these 24 cards.

Separate the 40 number cards from the 8 operation cards and shuffle them separately to […]

## Grades 4 to 6 Eleven Thousand

*By toni On 5 October, 2017 · Leave a Comment*

Choose pairs of these numbers to make the total of each pair as close to eleven thousand as possible?

Which total is closest to eleven thousand?

Which pair of numbers has the largest total?

What number would you add to each of these 8 numbers to make eleven thousand?

You might […]

## Years 4 – 7 Checkit

*By toni On 18 July, 2017 · Leave a Comment*

The numbers in the boxes are the sums of the numbers at the vertices.

Find the numbers to replace the question marks and check your answers by subtracting to check additions and adding to check subtractions.

Click here to download the CHECKIT worksheet.

Click here for the Notes for […]

## Years 6 – 7 Half a Million Game

*By toni On 17 July, 2017 · Leave a Comment*

The aim of the game is to make a number as close to half a million as possible. Which of the numbers in the table is closest to half a million?

This game uses ten cards numbered 0, 1, … 9. The cards are put face down and mixed up.

Each player […]

## Years 4 – 7 A Square of Numbers

*By toni On 6 May, 2015 · 13 Comments*

Can you put the numbers 1 to 8 (each number once and only once) into the circles so that the four calculations are correct?

This problem is adapted from the NRICH task A Square of Numbers with permission of the University of Cambridge. All rights reserved.

## Years 5 – 7 Rod Measures

*By toni On 18 January, 2012 · Leave a Comment*

Using 3 rods of lengths from 1 to 10 units, and not using any rod more than once, you can measure all the lengths in whole units from 1 to 10 units.

For example with rods of lengths 3, 4, and 9 the measurements are:

4 – 3 = 1; 9 – 4 […]

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