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JOSEPH (Parent) February 22 2017
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Adding decimal numbers is done exactly the same as normal numbers: the column method.
When you have 2 decimal numbers to add together the most important thing is to line up the decimal points (dots) so that they're all above each other. You should now have 2 numbers on top of each other to add together. If you have any gaps then quickly draw a 0 to fill it.
After this, start on the right hand side of the column and add together the numbers which are on top of each other. If the answer is less than 10 then write it below the numbers you just added together. If the number is above 10 then write down the last number: for example if your answer is 15 then write down 5, if your answer is 47 then write down 7, and if your answer is 22 then write down 2. The tens carries over to the next column of numbers (the column to the left of the one you just added together).
Keep doing this until you get to the far left of the column. If you've lined up the decimal point then you shouldnt have to worry about it whilst you do all the adding.
Finally, add a decimal point into your answer exactly below the others in your column equation.see more
This is your example problem: (m4)3
First of all remember what a single power means. So:
m4 = m x m x m x m
This must mean that:
(m4)3 = m4 x m4 x m4
If you expand this out, how many m's will you get?
(m4)3 = m x m x m x m x m x m x m x m x m x m x m x m
We have 12 m's. Can you see how we might get 12 from the numbers we were given in the question? By explanding it out we have proven that you multiply the 4 and the 3.
This rule can be applied to all problems like this.see more
Presenting your working out is extremely important because it's makes the examiners jobs easier, keeping them happy.
One thing you should aim to do is not write too small, try and use all the space you're given in the answer booklet. Leave clear spaces between different equations so they don't get muddled up.
Make sure that when you're writing down your working out you don't miss out any of the steps, even if you can easily do them in your head. This is because it makes it easier for the examiner to see how you got your answer. It also makes it easier for you to see where you might have slipped up when you check your work.
Laying out your mathmatical steps in order is also important. If you're doing equations, I would suggest that you work down the page, lining up the equals sign underneath each other.
Doing these things whilst you do practice exam questions will help you get into the habit of good presentation. Not only will your maths look good (who thought it could!?), most of all it'll help you get as many marks as you deserve!see more