## Basic Maths Skills Videos GCSE Grade C (NC Level 7) Topics

 Topic 1 - Understand and use Proportionality This video goes through the ideas of proportionality to do with conversion rates, ratio and Percentages. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Percentage Multipliers - Lesson  Percentage Multipliers - worksheet Topic 2 - Calculate using Proportional Change This video goes through the ideas of calculating proportional changes to do with percentages. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Proportion - Lesson  Proportion - worksheet Topic 3a - Multiply and Divide by numbers 0 - 1 This video goes through the ideas of Multiplying and Dividing numbers between 0 and 1. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Multiplying Decimals - Lesson  Multiplying Decimals - worksheet Topic 3b - Four rules of Fractions This video goes through some examples of adding, subtracting, multiplying and dividing fractions. Worked exam questions:-  RawMaths-1  2  MyMaths revision :-   Multiplying Fractions - Lesson  Multiplying Fractions - worksheet  Dividing Fractions - Lesson  Dividing Fractions - worksheet Topic 4 - Rounding and estimating to one significant figure This video goes through some examples rounding and estimating and then has some practice questions for you to attempt. Worked exam questions:-  RawMaths-1  MyMaths revision :-   Significant Figures - Lesson  Significant Figures - worksheet Topic 5 - Using a calculator efficiently This video goes through some examples of using a calculator and then asks you to have a go at some practice questions. Worked exam questions:-  RawMaths-1  2  MyMaths revision :-   Using a Calculator - Worksheet Topic 6 - Expanding two brackets This video goes through some examples of expanding two brackets and then asks you to have a go at some practice questions. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Double brackets - Lesson  Double brackets - worksheet Topic 7 - Solving simultaneous equations by elimination Although not strictly a Grade C / Level 7 topic this video goes through some basic examples of solving simultaneous equations by eliminatation. Worked exam questions:-  RawMaths-1  2  MyMaths revision :-   Simultaneous Equations 1 - Lesson  Simultaneous Equations 1 - worksheet Topic 8 - Drawing and Solving Inequalities This video goes through some examples of drawing inequalities on a number line and solving inequalities with only one variable (that means one unknown value). Worked exam questions:-  RawMaths-lots of questions  MyMaths revision :-   Inequalities - Lesson  Inequalities - worksheet Topic 9 - Using Formula and changing the subject This video goes through some of the basic skills for using formlae and changing the subject of some examples. Worked exam questions:-  RawMaths-lots of questions  MyMaths revision :-   Changing the subject - Lesson  Changing the subject - worksheet Topic 10 - Nth term of a Quadratic Sequence This video goes through how to use an nth term formula to generate terms in a sequence and then how to find an nth term formula for a basic Quadratic sequence. There is also a link to a much more detailed video on finding the nth term for any quadratic sequence. Worked exam questions:-  RawMaths-1  2  3  4  MyMaths revision :-   Quadratic Sequences - Lesson  Quadratic Sequences - worksheet Topic 11 - Plotting Quadratic and Cubic Functions This video goes through how to plot one quadratic and one cubic graph. Worked exam questions:-  RawMaths-1  MyMaths revision :-   Quadratic Graphs (Section 5) - Lesson  Quadratic Graphs (Q2) - worksheet Topic 12 - Pythagoras Theorem This video goes through the basics of using Pythagoras Theorem to solve questions in right angled triangles. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Pythagoras Theorem - Lesson  Pythagoras Theorem - worksheet Topic 13 - Volume of Prisms This video goes through how to calculate the area of 2-D shapes and therefore the volume of a prism. Worked exam questions:-  RawMaths-1  2  3  MyMaths revision :-   Volume of Prisms - Lesson  Volume of Prisms - worksheet Topic 14 - Enlarge with Fractional Scale factors This video goes through how to enlargements with a centre and fractional scale factors. Topic 15 - Locus of points This video goes through how to draw the basic loci or points that satisfy rules such as being equidistant from a point, two points and two lines. Topic 16 - Errors in Calculations This video goes through how to work out the maximum and minimum values when a number is rounded be it Descrete or Continuous data. Topic 17 - Compound Measures - Speed & Density This video goes through some examples of how to calculate Speed, Distance and Time or Density, Mass and Volume. Topic 18 - Planning a Statistical Survey This video talks through an example of the things to keep in mind for a statistical survey, then does a practice exam question. Topic 19 - Statistical Diagrams This video goes through an example of a typical scatter graph / correlation question and one on how to draw a frequency polygon. Topic 20 - Mean from a Grouped Frequency Table This video recaps how to calculate the mean from a frequency table then does an example of the mean from grouped frequency table. Then to finish off it goes through an exam question. Topic 21 - Compare Distributions This video describes how to compare to sets of summary data. Topic 22 - Relative Frequency This video goes through two examples of questions that might be asked about relative frequency which is the probablility from an experiment.