Surds  Level 1A selfmarking exercise on calculating, simplifying and manipulating surds (also known as radicals). 
Without using a calculator simplify the following. You can use the √ button to insert the radical symbol. You can earn a trophy if you get at least 9 questions correct and you do this activity online.
InstructionsTry your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help. When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file. 



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AnswersThere are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer. A Transum subscription unlocks the answers to the online exercises, quizzes and puzzles. It also provides the teacher with access to quality external links on each of the Transum Topic pages and the facility to add to the collection themselves. Subscribers can manage class lists, lesson plans and assessment data in the Class Admin application and have access to reports of the Transum Trophies earned by class members. If you would like to enjoy adfree access to the thousands of Transum resources, receive our monthly newsletter, unlock the printable worksheets and see our Maths Lesson Finishers then sign up for a subscription now: Subscribe 

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© Transum Mathematics :: This activity can be found online at:
wwww.Transum.org/go/?Num=3
Level 1  Simplifying surds
Level 2  Simplifying the product of two surds
Level 3  Simplifying the product of integers and surds
Level 4  Simplifying the sum of integers and surds
Level 5  Simplifying fractions containing surds
Level 6  Rationalising the denominator of a fraction
Level 7  Miscellaneous questions involving surds
Paper Surprising Perimeter  A wonderful surds problem with a surprising result.
Exam Style questions are in the style of GCSE exam paper questions and worked solutions are available for Transum subscribers.
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can doubleclick the 'Check' button to make it float at the bottom of your screen.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
There are three statements referring to surds in the English National Curriculum:
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The key properties you need are:
$$\sqrt{80} = \sqrt{4\times4\times5} = \sqrt{4}\times\sqrt{4}\times\sqrt{5} = 2\times2\times\sqrt{5} = 4\sqrt{5}$$
$$\sqrt{8}\times\sqrt{12} = \sqrt{4\times2}\times\sqrt{4\times3} = 2\times\sqrt{2}\times2\times\sqrt{3} = 4\sqrt{6}$$
$$(5+\sqrt{7})(5\sqrt{7}) = 25+5\sqrt{7}5\sqrt{7}7 = 257 = 18$$
This video is from UKMathsTeacher.
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can doubleclick the 'Check' button to make it float at the bottom of your screen.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
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Craig Barton, Twitter
Sunday, March 15, 2020