When calculating an answer it is important that you give careful consideration to the order of operations used in the calculation. If you are using a mixture of operations remember that certain operations take priority in a calculation. Consider the following, apparently, simple sum.

1 + 2 × 3 = ?

Did you give 7 as your response, or 9?

The correct answer is 7 but can you explain why?

If you have a calculator handy, check that it
Author(s): The Open University

1 Round a measurement of 1.059 metres:

• (a) to the nearest whole number of metres;

• (b) to two decimal places;

## Author(s): The Open UniversityLicense informationRelated contentExcept for third party materials and/or otherwise stated (see terms and conditions) the content in OpenLearn is released for use under the terms of the Creative Commons Attribution-NonCommercial-Share

1 Round the numbers below:

• (a) to the nearest 10.

• (b) to the nearest 100.

• (c) to the nearest 1000.

325 089,  45 982,  11 985
Author(s): The Open University

There are several symbols for powers and roots: for instance, 24 means ‘2 to the power 4’. An alternative to 24 is 24, where the symbol Author(s): The Open University

In recent years, graphical displays have come into prominence because computers have made them quick and easy to produce. Techniques of data exploration have been developed which have revolutionised the subject of statistics, and today no serious data analyst would carry out a formal numerical procedure without first inspecting the data by eye. Nowhere is this demonstrated more forcibly than in the way a scatterplot reveals a relationship between two variables.

Discharging a Whitehead Torpedo - Edison films 1900
From Edison films catalog Taken on board the US torpedo boat Morris It shows the crew loading a Whitehead torpedo into the tube and then discharging it The torpedo can be seen running along the surface of the water for a distance of over half a mile 75 feet 1125
Author(s): No creator set

This assessment course has two parts. Part A requires you to show what you did to plan, monitor, evaluate and reflect upon your skills. Part B requires you to select examples of your work that demonstrate what you have done to improve and apply your skills. Together the two parts form a portfolio of your achievements. You can use the guidance, Bookmarks and Skills Sheets included in the OpenLearn course U529_1 Key skills – making a difference to help you structure and present your wo
Author(s): The Open University

The origins of the wars of the three kingdoms
From Catholic rebellion to Civil War, what happened during the latter years of the reign of Charles I that caused people to take up arms against their fellow citizens? This free course, The origins of the wars of the three kingdoms, looks at the background of the wars between England, Scotland and Ireland and how the king's actions led to the rift between royalists and parliamentarians.Author(s): Creator not set

Celebrating our newsmakers
http://concordia.ca/now | http://www.concordia.ca/now/newsmakers/ Alan Shepard, president and vice-chancellor of Concordia University, recently welcomed some of the institution's newsmakers into his home for a warm celebration of their achievements. By speaking to members of the media about their research and providing expert commentary on subjects ranging from the royal family to climate change, Concordia's newsmakers help to keep Concordia's name in the public eye. Cheers to our newsmakers!
Author(s): No creator set

Series - the ratio test
This video describes how to use the ratio test to determine whether a series converges or diverges.
Author(s): No creator set

"DMC Upside:" Military Friendly School designation
Del Mar College was named a "Friendly Military School" for the "2013 Guide To Military Friendly Schools" by G.I. Jobs magazine. The honor puts Del Mar in the top 20 percent of all schools nationwide in serving U.S. military veterans through higher education. This segment of the "DMC Upside" television program was featured in the December 2012 edition, which airs on cable channel 19 in Corpus Christi. The "DMC Upside" is produced by DMC TV.
Author(s): No creator set

Earthquake Location and Magnitude
John Ristau shows how seismic waves are analyzed to find the source location and magnitude of an earthquake.  (04:03)
Author(s): No creator set

Jordan Peterson on Redemption and Psychology in Christianity
University of Toronto Psychology Professor, Jordan Peterson, on Redemption and Psychology in Christianity. Dr. Peterson's lecture was the keynote address at the 2012 Meaning Conference held in Toronto.
Author(s): No creator set

Giving Back
Kyle Negrete is an exemplary Trojan. One of 11 FBS football players named to the 2012 Allstate American Football Coaches Association Good Works Team, which recognizes players committed to making a difference in their communities. When not studying or perfecting his punting, Kyle can be found spending time with his friend Joel Anderson, a young artist with autism who Kyle has mentored for many years. Kyle also dedicates time each week to visit children in the cancer ward at the Children's Hosp
Author(s): No creator set

EC Scholars Video
Tomorrow starts here.
Author(s): No creator set

The Year at Duke in Photographs (2012)
A look back at 2012 with photographs of memorable Duke moments. 2012 was a memorable year for Duke University. An early highlight was January's Winter Forum, where more than a hundred Duke students explored what it means to be a refugee. Hundreds of other students from Duke and North Carolina Central University came together to package meals for an organization that fights hunger. At the end of January, the Duke community gathered to celebrate the life of Mary Duke Biddle Trent Semans, who ga
Author(s): No creator set

2012 Labor and Employment Panel and Reception
Employee Privacy and Communication in the Workplace December 6, 2012 Moderator: Mark Irvings '75 Panelists: Evan Fray-Witzer '93, James Shaw '07, Maia Spilman '96, Elizabeth Vorro '91
Author(s): No creator set

Early Childhood QTS - residential at Wasdale
First year students and staff on the BA Early Childhood Education in the Carnegie Faculty, reflect on a week of team building experiences and academic activities in the Lake District. They consider how the residential experience has enabled them to establish friendships and to understand the importance of outdoor learning for young children. For more information please visit http://www.leedsmet.ac.uk
Author(s): No creator set

Theologians in Conversaton; The Temple and the First Christians
Margaret Barker and Tom O'Loughlin discuss the significance that the first followers of Jesus attached to the temple in Jerusalem, and how the imagery of the temple played a role in their developing understanding of Jesus and of their own identity.
Author(s): No creator set

Virtual Maths, Shapes, Space and Measure, Sine, Cosine, Tangent, and Theta
Interactive tool demonstrating formulae for sine, cosine, and tangent with Theta
Author(s): Leeds Metropolitan University