Very large numbers! BOOM! How far? miles

How many seconds in 70 years? 70 years = seconds! Very large numbers! Happy 70 th Birthday! SPLAT!

Dinosaurs roamed the earth 228 million years ago Very large numbers!

Short hand! 100 = 10 x = 10 x 10 x = 10 x 10 x 10 x 10 x = 10 x 10 x 10 x = 10 x 10 x 10 x 10 x 10 x 10 10

Standard Form 200 = 2 x = 4 x = 5 x = 7 x = 3 x This is also known as Scientific Notation.

Exercise 1 (1)2 000 (2) (3) 500 (4) (5) = 5 x 100 = 8 x = 2 x = 9 x = 2 x 1000

Add the decimal point A short cut Between 1 and 10 The point moved 6 places Move the point to get a number between 1 and 10

A short cut Add the decimal point Between 1 and 10 The point moved 7 places Move the point to get a number between 1 and 10

A short cut Add the decimal point Between 1 and 10 The point moved 9 places Move the point to get a number between 1 and 10 Happy Birthday: Seconds old! SPLAT!

A short cut Add the decimal point Between 1 and 10 The point moved 8 places Move the point to get a number between 1 and 10

Exercise 2 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Changing back = Zeros after the point aren’t needed. The point moves 7 places Hint: Add 7 zeros, although you probably won’t need them all.

= Zeros after the point aren’t needed. The point moves 5 places Hint: Add 5 zeros, although you probably won’t need them all. Changing back

Exercise 3 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) = = = = = = = = = =

What’s this called? and this one? What’s this called? Name that number! one thousand one million one billion one googal !!!

Very small numbers! How wide is an atom? metres wide!

Standard Form for small numbers The point moved 10 places. Negative sign for small numbers. Move the point to get a number between 1 and 10

Standard Form for small numbers The point moved 7 places. Negative sign for small numbers. Move the point to get a number between 1 and 10

Standard Form for small numbers The point moved 6 places. Negative sign for small numbers. Move the point to get a number between 1 and 10

Exercise 4 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Changing back small numbers = Hint: Add 3 zeros to the left of the number. -3 so remember to move point left for small numbers..

Changing back small numbers = Hint: Add 5 zeros to the left of the number. -3 so remember to move point left for small numbers.

Changing back small numbers = Hint: Add 6 zeros to the left of the number. -3 so remember to move point left for small numbers.

Exercise 5 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) = = = = = = = = = =