Hmm.
What is ?
Hi,
I have a test paper which I am going through but I am struggling on on question, below.
I am not permitted to use a calculator.
Although this would be simple to do in your head, I want to know how I could do it on paper:
30.00
0.86
The answer (yes I cheated, but won't on the actual test) is: 29.14, but I never get this answer when I try and work out this subtraction on paper.
Could someone explain the technique which I need to use to show it on paper?
Thank you.
You might want to google a few sites like:
Cool math Lessons - How to Subtract Decimals (Subtraction)
Subtraction with Decimals
to look at a few examples.
This kind of post is the reason I think that calculators are introduced waaaay too early in the Mathematics curricula.
As quick suggests, write it out like a regular subtraction. Make sure that you put the decimals in line like this:
Now forget that the decimal point exists and subtract:Code:30.00 -0.86
Now put the decimal point back in:Code:3000 - 86 2914
-DanCode:30.00 -0.86 29.14