**"Addition"**

## Years 6 – 12 Ishango Bone

*By toni On 9 July, 2019 · Leave a Comment*

The numbers 3, 5, 7, 11, 13, 17 and 19 are prime numbers. Can you make a total of 60 from four of these numbers?

One of three columns of tally marks on The Ishango Bone gives the answer to this question. Found in the Ishango region of the Democratic Republic of […]

## Years 7 – 9 Durer’s Magic Square

*By toni On 16 March, 2018 · Leave a Comment*

Add the columns one by one, add the rows, then add the diagonals. What do you notice?

Add the numbers in the squares at the corners of each parallelogram shown. What do you notice? Yes, so far all these totals have been 34.

In addition the diagram with the […]

## Years 4 – 5 Target 100

*By toni On 3 January, 2018 · Leave a Comment*

This is a game for the whole class. It can be played a few times as a lesson starter. The teacher will need a 0 to 9 spinner or dice.

All the learners should draw in their notebooks a hundreds, tens and units grid as shown. The teacher spins the spinner and […]

## Years 4 – 7 Target 1000

*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 need a spinner […]

## Years 4 – 12 The answer is 2020, what is the question?

*By toni On 1 January, 2018 · Leave a Comment*

Is it correct to say “twenty twenty” or should we say “two thousand and twenty” or are both correct? Why?

People say “twenty twenty” so do the 2 twenties mean – 20 thousands, 20 hundreds, 20 tens or 20 units?

You can be a creative mathematician, you can be someone who has […]

## Grades 4 to 8 How many sums?

*By toni On 1 January, 2018 · Leave a Comment*

1 + 2018 = 2019. How many other ways can you put positive whole numbers into the boxes to make the sum correct?

Explain your answer.

Now answer the same question for the year you were born.

## 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 […]

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