Decimals and calculators

Decimals and calculators
Decimals and calculators
You can use a calculator to solve questions with decimals, but you need to be able to enter the
numbers correctly and understand what the displayed answers mean.
Example: money
When you use a calculator to solve money questions you might want your answer to be shown in
pounds and pence. So you should enter the amounts using decimals.
For example:
£1.45 is entered as
62p is entered as 0.62.
£4.80 is entered as 4.8 This
is because a calculator does
not know that you are
working with money so it’s
not necessary to key in the
last zero.
When a calculator shows money values in pounds and pence, you must write the amount showing
two digits after the decimal point. For example:
Means £2 and 5p.
Means 34p.
Means £1 and 60p.
£0.34 or 34p
Sometimes when you do a money calculation on the calculator it will display a number with lots of
digits after the decimal point, such as:
When working with money you only need to read the first two digits after the decimal point. For
Means £4 and 33p.
Means £12 and 3p.
Means 67p
(round up the second digit).
© BBC 2011
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