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Ordering Decimals

 Adult Numeracy, Decimals, Functional Maths, GCSE Maths, Level 1, Level 2, Quia  No Responses »
Nov 012011
 

Ordering decimals

To complete this quiz you need to be able to order decimals. Here is an example to help you.

Which is bigger, 0.3 or 0.25?

Ever so many people make the mistake of saying 0.25 is bigger because 25 is bigger than 3. This is very wrong!

Remember the place value of decimals.

0.3 means three tenths.

0.25 means 2 tenths and 5 hundredths.

Three tenths is bigger than 2 tenths, so 0.3 is bigger.

 

Converting between decimals and fractions

 Adult Numeracy, Decimals, Fractions, Functional Maths, GCSE Maths, Level 1, Level 2, Quia  No Responses »
Nov 012011
 

Converting between decimals and fractions

 

Thanks to John Ford for this quiz.

You need to be able to convert fractions to decimals and decimals to fractions.

To convert a fraction to a decimal divide the numerator (top number) by the denominator (bottom number).

eg 3/4

3÷4 = 0.75

To change a decimal to a fraction think what place value the number on the right hand side has.

eg 0.45

The 5 is in the hundredths column, so the denominator will be 100.

The numerator is 45

So 0.45 = 45/100

This cancels down as both numbers divide by 5.

45/100 = 9/20

Factors, Multiples and Primes

 Adult Numeracy, Functional Maths, GCSE, GCSE Maths, Level 2, Quia  No Responses »
Oct 302011
 

A factor is a number that divides into another number without a remainder. So the factors of 15 are 1, 3, 5 and 15.

The multiples of 4 are all the numbers in the 4 times table. 4,8,12,16,20,24,28,32……..

A prime number is special because it only has 2 factors.  These two factors are always 1 and the number itself. So 7 is a prime number because the factors of 7 are 1 and 7.

Try matching the questions to the answers in these columns.

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