**"Operations"**

## Target Game with Integers

*By toni On 30 January, 2021 · Leave a Comment*

In this game players combine two given numbers to get as close to a target as possible using one of the operations: addition +, subtraction -, or multiplication ×, and each number once and only once. For example, combining (-3) and (-5) to get as close as possible to the target of […]

## Addition/subtraction of 2 digits numbers

*By Kwethemba Moyo On 30 April, 2020 · Leave a Comment*

Below are three addition- subtraction problems that are classified into Level 1, Level 2, and Level 3.

Level 1: Find the sums and difference of the numbers indicated on the diagram (vertically/horizontally)

Level 2: Fill in the empty boxes such that the sums (difference) of the horizontally and vertically arranged numbers satisfy the given […]

## Beautiful Numbers

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

Work out the different numbers to replace the question marks.

What do you notice about the patterns in these calculations?

Can you explain why this pattern occurs?

## Number Sentences

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

Put the missing symbol into the box to make these number sentences correct.

Use the symbols +, −, ×, ÷ and =.

17 ☐ 21 = 38

17 ☐ 3 = 51

57 ☐ 29 = 28

9 ☐ 63 ÷ 7

You can make most of the number sentences below correct by putting in […]

## Exponents

*By Ben Walker On 24 November, 2016 · Leave a Comment*

Working either in small groups or as a whole-class activity, you will be given two sets of small cards. On one set expressions, such as 68 ÷ 64, are given. In the other set single values, such as 64, are given. Work out the value of the cards using the laws of exponents or by […]

## Building Functions

*By toni On 19 November, 2016 · Leave a Comment*

Amy and her friends have built some functions. If they all input the number 1 into their functions Amy’s output would be 6, Busi’s 1, Chris’s 6½ and Dudu’s 3½.

Build some of your own functions using the operations [subtract 2], [multiply by 3], [divide by 2] and [add […]

## Years 3 – 10 I’m Eight

*By toni On 27 July, 2016 · Leave a Comment*

When I went into a classroom earlier this week a child rushed up to tell me she was 8 that day!

Well, Happy Birthday to everyone who has a birthday today!

Whatever age you are, can you find a variety of questions that give your age as the answer? This […]

## 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.

Using the numbers 1, 2, 3, 4 and 5 once and only once and the symbols × and ÷ once and only once, what is the smallest whole number you can make?

Now suppose you have to use the symbol + once and the symbol ÷ twice what is the smallest fraction […]

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