Warm up Notes Preliminary Activity Activit y For Fun Scientific Notation and Order of Operations

Back Multiply these numbers together and call out the answer ml

Back Scientific Notation Scientific notation is always written in 3 parts. Part 1. a number between 1 and less than 10 Part 2. multiply by 10 Part 3.an index on the 10 to indicate the movement of the decimal point Examples 1. Write in scientific notation 3.45 x Write in scientific notation 9 x

Back Questions 1. Write the normal number for: a) 3 x b) 9 x c) 8 x 10 7 d) 4 x Write these numbers in Scientific Notation a) b)0.584 c) d) x x x x 10 7

Back Questions 1. The star nearest the Earth is approximately kilometres from the sun. Write the distance in scientific notation. 2. A micron is one-millionth of a metre. Write 3 microns as a decimal of a metre, using scientific notation. 3. Round the following a) x to 3 significant figures b) x to 2 significant figures 4. Evaluate the following, give your answers in scientific notation to 3 significant figures. a) (3.8 x 10 6 ) x (5.75 x 10 3 ) b) x 10 3 ) ÷ (8.49 x ) c) d) 4.16 x x x x x x x x 10 -3

5. Using the correct order of operations evaluate the following a) 8 + (4 x 6) b) 30 - [12 ÷ (4 ÷ 4)] c) 56 ÷ [(4 x 6) - (2 x 8)] d) 9 x e) 33 (3 x 7) - 10 f) 15 + (9 x 3) g) h) 6. The symbol for absolute value, I I, also acts as a grouping symbol. The absolute value of a number is its numerical value without regard to sign. Ι7I = 7 and I-7I = 7Solve a) I15 - 7I b) I9 - 14I c) I7 - 13I + 6 d) I9 - 15I x I3 x (5 - 2)I x x Back

End of topic 1 - well done! Yo u should go onto Mathletics and Maths on line to complete this chapter in each.