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Scientific Notation www.mathsrevision.com General Standard form / Scientific Notation Scientific Notation to Number Form Scientific Notation very small numbers www.mathsrevision.com Starter Questions www.mathsrevision.com General 1. 2.35 + 4 0.25 2. Calculate (-14)+(-5)+8 3. What fraction is x: 16 4. Simplify the fraction 80 5. Calculate 20% of 210 www.mathsrevision.com X Scientific Notation www.mathsrevision.com General Learning Intention Success Criteria 1. To show a very quick way of putting a large number in scientific notation very quickly. www.mathsrevision.com 1. To understand and use the quick method to put large numbers into scientific notation. Very large numbers! www.mathsrevision.com General BOOM! How far? 92 000 000 miles Very large numbers! General www.mathsrevision.com Happy 70th Birthday! SPLAT! Howyears many= seconds in 70 years? 70 2 200 000 000 seconds! Very large numbers! www.mathsrevision.com General Dinosaurs roamed the earth 228 million years ago Short hand ! www.mathsrevision.com General 10 10 1 100 = 10 x 10 10 2 10 4 10 000 = 10 x 10 x 10 x 10 10 5 100 000 = 10 x 10 x 10 x 10 x 10 10 1 000 = 10 x 10 x 10 3 1 000 000 = 10 x 10 x 10 x 10 x 10 x 10 10 6 Standard Form General www.mathsrevision.com 200 = 2 x 100 2 10 2 4 10 4 70 000 = 7 x 10 000 7 10 5 500 000 = 5 x 100 000 5 10 6 3 000 000 = 3 x 1 000 000 3 10 4 000 = 4 x 1000 3 This is also known as Scientific Notation. Standard Form www.mathsrevision.com General Exercise 1 (1) 2 000 = 2 x 1000 2 10 (2) 20 000 = 2 x 10 000 3 2 10 4 (3) 500 = 5 x 100 5 10 2 (4) 800 000 = 8 x 100 000 8 10 5 (5) 9 000 000 = 9 x 1 000 000 9 10 6 A short cut www.mathsrevision.com General Move the point to get a number between 1 and 10 8. 000 000. 8 10 Add the decimal point Between 1 and 10 6 The point moved 6 places A short cut www.mathsrevision.com General Move the point to get a number between 1 and 10 92 . 000 000 . 9.2 10 7 Add the decimal point Between 1 and 10 9.2 10 miles 7 The point moved 7 places A short cut General Move the point to get a number between 1 and 10 2. 200 000 000 . 2.2 10 9 The point moved 9 places Add the decimal point Between 1 and 10 Happy Birthday: 2.2 10 9 Seconds old! A short cut www.mathsrevision.com General Move the point to get a number between 1 and 10 228 . 000 000. 2.28 10 Add the decimal point 8 The point moved 8 places Between 1 and 10 2.28 10 years ago! 8 Standard Form www.mathsrevision.com General (1) 30 000 3 1045 (2) 700 000 7 10 3 (3) 5 300 5.3 10 5 (4) 470 000 4.7 106 (5) 9 500 000 9.5 107 (6) 18 300 000 1.83 10 5 (7) 329 000 3.29 10 6 (8) 2 560 000 2.56 10 (9) 12 000 000 000 1.2 1010 6 (10) 9 990 000 9.99 10 Starter Questions General www.mathsrevision.com 1. Find the highest number that divides into 8 and 18 without leaving a remainder. 2. Simplify 2 y 3x 5 y 4 x 5xy 3. Write 72% as a decimal 4. Write in scientific notation 230000 5. 30% of £600 www.mathsrevision.com Scientific Notation www.mathsrevision.com General Learning Intention Success Criteria 1. To understand how to change large numbers from Scientific Notation to number form. www.mathsrevision.com 1. Know how to expand large numbers in scientific notation to number format. Changing back www.mathsrevision.com General The point moves 7 places 8.6 10 8.60000000 . =86 000 000 7 Hint: Add 7 zeros, although you probably won’t need them all. Zeros after the point aren’t needed. Changing back www.mathsrevision.com General The point moves 5 places 3.46 10 3.4600000 . =346 000 5 Hint: Add 5 zeros, although you probably won’t need them all. Zeros after the point aren’t needed. Changing back www.mathsrevision.com General (1) 6 105 (2) 8 103 (3) 6.5 105 (4) 1.2 108 (5) 3.71106 (6) 3.3 104 (7) 7.91106 (8) 5.55 107 (9) 1.05 104 (10) 3.033 109 = 600 000 = 8 000 = 650 000 = 120 000 000 = 3 710 000 = 33 000 = 7 910 000 = 55 500 000 = 10 500 = 3 033 000 000 Name that number! General www.mathsrevision.com 1 000 1 000 000 1 000 000 000 110 6 110 9 110 3 one thousand one million one billion 10 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 one googal !!! 110 100 Starter Questions www.mathsrevision.com General 1. Find the highest number that divises into 28 and 14 without leaving a renainder. 2. Simplify 6a 9b 15a 14b 5a 3. Write 55% as a decimal 4. Find the lowest number that both of 5 and 9 divide into without leaving a remainder. 5. 15% of £400 www.mathsrevision.com Scientific Notation www.mathsrevision.com General Learning Intention Success Criteria 1. To understand how to change very small numbers into Scientific Notation and vice versa. www.mathsrevision.com 1. Know how to change very small numbers into scientific notation and how to do the reverse process. Very small numbers! www.mathsrevision.com General How wide is an atom? 0.000 000 000 1 metres wide! Standard Form for small numbers www.mathsrevision.com General Move the point to get a number between 1 and 10 0.000 000 000 1 . 110 10 The point moved 10 places. Negative sign for small numbers. 1 10-10metres wide Standard Form for small numbers www.mathsrevision.com General Move the point to get a number between 1 and 10 . 7.6 10 0.000 000 76 7 The point moved 7 places. Negative sign for small numbers. Standard Form for small numbers www.mathsrevision.com General Move the point to get a number between 1 and 10 0.000 001. 93 1.93 10 6 The point moved 6 places. Negative sign for small numbers. Standard Form for small numbers www.mathsrevision.com General 4 (1) 0. 000 3 3 10 5 (2) 0.000 07 7 10 4 (3) 0.000 45 4.5 103 (4) 0.003 4 3.4 10 (5) 0. 000 724 7.24 104 7 (6) 0.000 000 494 4.94 10 5 (7) 0.000 095 9.5 108 (8) 0.000 000 098 9.8 10 4 (9) 0.000 1 03 1.03 1010 (10) 0.000 000 000 66 6.6 10 Changing back small numbers www.mathsrevision.com General -3 so remember to move point left for small numbers. Hint: Add 3 zeros to the left of the number. 2 10 000 . 2. -3 = 0.002 Changing back small numbers www.mathsrevision.com General -5 so remember to move point left for small numbers. Hint: Add 5 zeros to the left of the number. 8.6 . 8.6 10 00000 -5 = 0.000 086 Changing back small numbers www.mathsrevision.com General Hint: -6 so remember to move point left for Add 6 zeros to the left of the number. small numbers. 5.16 5.16 10 000000 . -6 = 0.000 00516 Changing back small numbers www.mathsrevision.com General (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 4 = 0.000 5 9 105 = 0.000 09 3 5.8 10 = 0.005 8 7 6.2 10 = 0.000 000 62 6.45 106 = 0.000 006 45 5.3 107 = 0.000 000 53 6 = 0.000 009 17 9.17 103 2.12 10 = 0.002 12 5 2.03 10 = 0.000 020 3 9 6.032 10 = 0.000 000 006 032 5 10