Home / Interactive Lessons / Number / GCSE / Year 10 Term 3

Rationalising Denominators

Number: Interactive Lessons
Rationalising Denominators
Rationalising Denominators
Rationalising Denominators
Rationalising Denominators
Rationalising Denominators

              Rationalising Denominators

              The start of the lesson reviews simplifying products and quotients involving surds since this is prerequisite knowledge for the remainder. In the development phase students are introduced to rationalising the denominator.  As learning progresses students are required to expand out a bracket using surds. The plenary challenges students to evaluate the areas of a rectangle and triangle where the dimensions are given with irrational fractions.
              Differentiated Learning Objectives
              • All students should be able to rationalise a denominator with a integer term as the numerator
              • Most students should be able to rationalise a denominator with a surd as the numerator
              • Some students should be able to rationalise a denominator with a integer and surd in the numerator
              View online lesson
              Lesson Downloads
              Download PowerPoint Download Notebook Download Flipchart Download Worksheet
              Schemes of Work Link
              Indices and Standard Form Higher
              Related Blog
              How to Simplify Surds
              IMMEDIATE DOWNLOAD
              SKU: 153 Categories: , , , , ,

              You may also like...

              Number
              Number
              Interactive Lessons

              Prime Factor Decomposition

              Students learn how to break down a number using its prime factors and write the result using index notation.  As...
              GCSE / Year 11 Term 1
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Indices with Negative Powers

              Students learn how to calculate the reciprocal of a number and evaluate indices with negative powers.  As learni...
              GCSE / Year 10 Term 3
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Indices with Fractional Powers

              Students use reciprocals to evaluate indices with fractional and decimal powers.  Using square and cube numbers ...
              GCSE / Year 10 Term 3
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Highest Common Factor and Lowest Common Multiple

              Using prime factors and Venn Diagrams students are able to calculate the highest common factor and lowest common...
              GCSE / Year 10 Term 3
              Interactive Lessons

              Related Mr Mathematics Products

              Number
              Number
              Interactive Lessons

              Volume of a Cone

              Students learn how to calculate the volume of a cone using the base area and perpendicular height.  As learning ...
              GCSE / Year 11 Term 2
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Rounding to Significant Figures

              Students learn how to round a number to a significant figure using number lines and place value.  As learning pr...
              GCSE / Year 10 Term 2
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Adding and Subtracting with Decimals

              To add and subtract with decimal numbers students learn how to use the place value table to align the digits in ...
              GCSE / Year 9 Term 5
              Interactive Lessons
              Number
              Number
              Interactive Lessons

              Dividing Fractions and Mixed Numbers

              Students learn how to divide with fractions and mixed numbers using numerical and calculator methods.  As learni...
              GCSE / Year 9 Term 4
              Interactive Lessons

              Mr Mathematics Teaching Resources Term by Term

              Year 7 Term 1 Year 7 Term 2 Year 7 Term 3 Year 7 Term 4 Year 7 Term 5 Year 7 Term 6
              Year 8 Term 1 Year 8 Term 2 Year 8 Term 3 Year 8 Term 4 Year 8 Term 5 Year 8 Term 6
              Year 9 Term 1 Year 9 Term 2 Year 9 Term 3 Year 9 Term 4 Year 9 Term 5 Year 9 Term 6
              Year 10 Term 1 Year 10 Term 2 Year 10 Term 3 Year 10 Term 4 Year 10 Term 5 Year 10 Term 6
              Year 11 Term 1 Year 11 Term 2 Year 11 Term 3 Year 11 Term 4 Year 11 Term 5

              Mr Mathematics Blog

              Literacy in Mathematics – Creating Problem Solvers

              October 28, 2019

              Last year my school had a OFSTED trial inspection. Whilst the maths team recieved favourable feedback the inspectors noted a need for a focus on whole school literacy. Because of this I was asked to demonstrate how we develop student’s literacy in mathematics. Literacy in Mathematics By developing student’s literacy in mathematics we aim to […]

              Angles in Polygons

              October 16, 2019

              There are two key learning points when solving problems with angles in polygons.  The first is to understand why all the exterior angles of a polygon have a sum of 360°.  The second is to understand the interior and exterior angles appear on the same straight line. Students can be told these two facts and […]

              Getting Ready for a New School Year

              August 22, 2019

              When getting ready for a new school year I have a list of priorities to work through. Knowing my team have all the information and resources they need to teach their students gives me confidence we will start the term in the best possible way.  Mathematics Teaching and Learning Folder All teachers receive a folder […]