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Video: What Are The Multiples And Factors Of A Number
This video explains what the multiples and factors of a number are. Practice questions are at the end of the video.
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Video: Semi-Regular Tessellations
This short video explains how to identify semi-regular tessellations: tessellations made up of two or more regular polygons.
Practice questions are at the end of the video.
For an explanation of regular tessellations, see our video:
https://youtu.be/PiOa_vWKJA4
Skip to:
00:00 What are semi-regular tessellations
00:34 How to identify the pattern at the vertex
01:21 Practice questions
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Video: Types Of Triangles And Their Properties
This video will explain the four types of triangles and their properties: right-angled, equilateral, isosceles and scalene triangles. Practice questions are at the end of the video.
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The Four Transformations In Maths
This video explains the four transformations in maths: translation, rotation, reflection and enlargement. Two sets of practice questions are provided at the end of the video.
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Video: Sharing In A Given Ratio
This video explains sharing in a given ratio. Two sets of practice questions are provided at the end of the video.
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Circumference of a Circle
This video will explain how to find the circumference of a circle given the diameter or the radius. We show you how the formula is actually derived.
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How To Read Inequality Symbols
This video explains how to read inequality symbols; greater than and less than. We explain a quick tip to help you remember which one is which. Practice questions and answers are at the end of the video.
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Rotational Symmetry of a Circle
This video explains why the order of rotational symmetry of a circle is infinite.
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How To Simplify Ratios
This video explains how to simplify ratios, including how to simplify ratios that include decimal numbers, mixed units and fractions. We also explain how to get a ratio in the form 1:n or n:1. Make sure you have a go at all the practice questions at the end of the video.
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Video: How To Solve Algebra Word Problems
This video will explain how to solve algebra word problems. We explain how to form expressions and equations from wordy questions. The video starts off with simple examples, building up to the more complex age problems. Practice questions are provided throughout the video.
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Multiplying Decimals Without A Calculator
This video explains how to multiply decimal numbers without using a calculator. We explain two different ways to do this; remove the decimal points (this can be used with grid, line and column multiplication methods) or by keeping the decimal points in place for the lattice method.
Practice questions are at the end of the video.
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Video: Rotational Symmetry
This video explains what rotational symmetry is and how to find the order of rotational symmetry of a shape. Practice questions and answers are at the end of the video.
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Visual Algebra: Rods
Visual Algebra Series Video One: This video explores a different way to think about and visualise algebra using rods. In this video we use the rods to visually represent unknown values. We explore forming expressions and equations using these rods. There are two practice puzzles at the end of the video.
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Bearings in Maths
Link to YouTube video: This video will explain what bearings are in maths and how to calculate them. A practice question is provided at the end of the video.
Below are some useful videos to watch prior to this:
Angles in parallel lines: https://youtu.be/5vgv3gLPXog
Basic angle facts: https://youtu.be/uIOHgLmrVmY
Skip to:
00:00 What is a bearing & examples
01:12 Example one: finding a bearing from a given point
02:29 Example two: finding a bearing when given another bearing
03:34 Example three: finding a point when given two bearings
04:33 Practice question and answer
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Probability Tree Diagrams
Link to YouTube Video: This video explains how to work with tree diagrams for probability. We explain how to use them to calculate probabilities for a combination of outcomes for more than one event and how to draw a tree diagram for a probability question.
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Video: Types of Angles
This video will explain the different types of angles in math. We explain acute angles, right angles, straight angles, obtuse angles, reflex angles and full rotations. Two sets of practice questions are at the end of the video for students to test their knowledge.
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Video: Simplifying Surds: Multiplication
This video explains what simplifying a surd means and how to simplify surds by multiplication. The three multiplication rules are explained with examples. Practice question at the end of the video.
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Angles in Parallel Lines
This is a link to our YouTube video which explains the rules for an angle formed by a transversal (line) crossing a pair of parallel lines: corresponding angles, alternate angles, corresponding angles and allied angles. Practice questions are at the end of the video.
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Why Do We Use Letters In Algebra
This is a gentle introduction to algebra and is a great activity to introduce the concept of using letters to represent unknown values. To demonstrate this we use shapes in place of letters and ask learners to find the missing number. Practice questions are provided at the end of the video.