$$\frac{44}{44}$$
$$\frac{4\times4}{4+4}$$
$$\frac{4\times4-4}{4}$$
$$4+4\times(4-4)$$
$$\frac{4}{4}+\sqrt4+\sqrt4$$
$$\frac{4}{4}\times4+\sqrt4$$
$$\frac{44}{4}-4$$
$$4+4+4-4$$
$$4+4+\frac{4}{4}$$
$$\frac{44-4}{4}$$
$$\frac{44}{\sqrt4+\sqrt4}$$
$$\frac{44+4}{4}$$

A special clock for American Independence Day. It only uses the digit 4.
Can you design a special clock for a different day of the year using a different digit?

## A Mathematics Lesson Starter Of The Day

• Transum,
•
• At the time of writing this is a brand new Starter of the Day so please let us know whether you like it by leaving a comment or giving it a score using the buttons below. An alternative way of using this starter is to have it on the screen when the pupils are coming into the room then, after everyone has had chance to see it, turn off the projector and ask the class to reproduce it as best they can. Each number of the clock is replaced by four fours. Happy Independence day to all in the USA.
• Chistopher Boyle, St James's
•
• The clock got the four sign incorrect! It could have been 4 x (4/4).

[Transum: Thanks for your comment Christopher, but if you use the correct order of operations (BIDMAS) the multiplication should be done before the addition. The four is in fact correct. Your suggestion only includes 3 fours. Keep looking for errors though as feedback is very much appreciated]
• Friday, March 9, 2018

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
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Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 3.0 out of 5 based on 145 votes.

Previous Day | This starter is for 4 July | Next Day

There are of course many ways pupils might respond to this challenge but here is an example of a solution

$$1=\left(\frac{9}{9}\right)^9$$

$$2=\left(\frac{9+9}{9}\right)$$

$$3=\sqrt{9}+9-9$$

$$4=\sqrt{9}+\frac{9}{9}$$

$$5=\sqrt{9}!-\frac{9}{9}$$

$$6=\sqrt{9}\times\sqrt{9}-\sqrt{9}$$

$$7=\sqrt{9}!+\frac{9}{9}$$

$$8=9-\frac{9}{9}$$

$$9=9+9-9$$

$$10=9+\frac{9}{9}$$

$$11=99\div9$$

$$12=9+\frac{9}{\sqrt{9}}$$

This type of challenge has been around for a long time. The first known reference is in a book called "The Schoolmasters Assistant: Being a Compendium of Arithmetic, Both Practical and Theoretical". It was written in 1762 by Thomas Dilworth, an English cleric. Here is the wording as it appeared in the book:

$$33+\frac33 = 34$$

Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items chosen and recommended by Transum Mathematics to get you started.

## Have you read Craig's book yet?

Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more...

"How I wish I’d taught maths' is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL.

## Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Transum.org/go/?Start=July4

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=onedigit

Here is the link to the pairs game based on American-English and British-English mathematical words.

Transum.org/go/?to=MathvsMaths

Here is a visual aid for teachers to use when teaching alalogue time.

Transum.org/go/?to=clock

For Students:

For All: