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Number Sense and Numeration (Exponents) for Mrs Hughes

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Noreen Haji

on 24 October 2013

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Transcript of Number Sense and Numeration (Exponents) for Mrs Hughes

Number Sense and Numeration (Exponents)
Order of
Scientific Notation
It is a way to write very big or small numbers using powers if 10.

Convert a number from scientific notation to expanded form using powers of 10 e.g. 10^2 x 1.23 = 123

Convert a number from expanded form to scientific notation using powers of 10. e.g. 10 352 = 1.0352 x 10^4
Pattern With Power and Exponents
The questions we were given was either an expression or it was written in words for us to write as a power.
e.g.- An expression to a power = 2 x 2 x 2 x 2
= 2^4
- In words to a power
= 32 as a power of 2
= 2^5
Negative and Positive Exponents
Negative exponent:
e.g. 10^4 = 0.0004
- What is happening here is that the amount of zeros given are the amount of spaces there will be behind the decimal point.

Positive exponent :
e.g. = 10^4 = 100 000
- What is happening here is that the exponent is the amount of zeros that are going to be added to the end of the number already given.
Powers of 10
I learned Powers (of a number)
- The power of a number (exponent) shows how many times a number is multiplied by itself
e.g. 10^4=10×10×10×10 = 10 0000
When its a power of 10,a simple way to do it is, to add on the amount of times you are multiplying, and just add the same amount of zeros to the end of the number already given.

These are some of the things that I
learned during this unit
Bedmas is the "order" in order of operations. Meaning, that when you are dealing with an equation that are all different operations, lets say there are all six operations (bedmas) in the equation you are doing, and obviously you would start doing any operation you want to start with, but actually you are suppost to go in a specific order and that is bedmas. B (brackets) being the first thing you do in the equation, and S (subtraction) or A (addition) being the last, since you do them in the order that they come in.
Do it in whatever order they come in
Do it in whatever order they come in
There are two parts to a power,they are, a base, and an exponent.
e.g.- 2^4 = 2 is the base and the 4 is the exponent.
- 5^9 = 5 is the base and 9 is the exponent.
When writing an expression all you have to do is look at the exponent and multiply the number given that many times.
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