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S3 Credit Maths Mr Hawkins

S3 Credit Maths Mr Hawkins. 3 Jotters. Notes Working Homework. Failure to complete work or hand in homework will result in a detention or punishment exercise being issued. Calculations and Calculators. 1. Calculate the value of (a) 10 2 (b) 2.6  10 3. Page 1 Looking back.

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S3 Credit Maths Mr Hawkins

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  1. S3 Credit MathsMr Hawkins 3 Jotters • Notes • Working • Homework Failure to complete work or hand in homework will result in a detention or punishment exercise being issued.

  2. Calculations and Calculators 1. Calculate the value of (a) 102 (b) 2.6  103

  3. Page 1 Looking back.

  4. Calculator Practise Page 2 Exercise 1

  5. Large and Small Numbers The distance to the sun is 93 million miles. Key this into your calculator. • Calculate the distance to a star which is; • 10 times as far away? (b) 1000 times as far away? • (c) 1000 000 times as far away? What is on your screen? This is because the number is too big to fit on your screen. We use STANDARD FORM or SCIENTIFIC NOTATION to show large or small numbers

  6. Standard form is a way of writing all numbers in the form where a is between 1 and 10 and n is a zero or a positive or negative whole number. Numbers greater than 1 have a positive Index Numbers less than 1 have a negative Index

  7. Consider the following identical numbers. Standard form Normal or Floating Point form Page 5 Exercise 4 Page 6 Exercise 5A

  8. Large and Small Numbers - 2 Page 7 Exercise 5B

  9. Fractions Page 8 Exercise 6 Questions 1 to 4.

  10. Adding and Subtracting Fractions Remember: A fraction consists of two parts, Numerator Denominator To add fractions their denominators MUST be the same.

  11. We first need to find the lowest common denominator. (L.C.D.) i.e. what number can be divided by 3 and 2? The L.C.D. is 6.

  12. The L.C.D. is . 12

  13. The L.C.D. is . 12

  14. We must change them into fractions before we start. The L.C.D. is . 4 Page 9 Exercise 7A

  15. Multiplying Fractions It is easier to show the process of multiplying fractions using symbols. If necessary, simplify the fraction.

  16. 10 3 1 Let us find an easier method 12 1 1 3 4 It is easier to cancel before multiplying. Page 10 Exercise 8A and 8B

  17. Dividing Fractions Dividing is the INVERSE of multiplying. Think about it! (dividing by 2) What is the same as ‘MULTIPLYING BY A HALF’? Turning a fraction ‘upside down’ is called a ‘reciprocal’. To divide fractions we simply multiply by the reciprocal.

  18. 2 1 Page 12 Exercise 9B Check Up

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