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LCM and HCF

LCM means Lowest Common Multiple and HCF means Highest Common Factor. There sre 4 parts to this: Basic LCM: Find the LCM of 4, 6 and 8....

Indices

Advance warning - I cannot type indices properly, so I am just doing x^2 for x squared, etc. For those who are new entirely to this...

Dividing fractions

Hello again! Today we're going to look at dividing fractions. Please note that any mixed numbers will need to be converted to improper...

Improper fractions to mixed numbers

We've managed to convert mixed numbers to imoproper fractions, so let's try it the other way around. Our question is: Write 13/6 as a...

Mixed numbers to improper fractions

Sometimes we might get a question like this: Convert 3 1/4 into an improper fraction. First we multiply the number (3) by the denominator...

Multiplying fractions

Ok, let's say we're given this question: Calculate 1/2 x 1/3 First of all, we multiply the numerators (the numbers on top): 1 x 1 = 1 And...

Calculating percentage increase

So, let's say we're given this question: Poppy has £6. Her mum gives her an extra £2. Calculate the percentage increase in Poppy's money....

Sets with Venn diagrams

Welcome to the harder sets content, using Venn diagrams. So, we get this question: List the elements of a) A b) A ⋂ B c) A ⋃ B Ok,...

Sets - basic

So, we have the set A. The things in set A are called ELEMENTS of set A. Let's say: A = {months of the year with less than 31 days} List...

Adding and subtracting fractions

This looks hard, but is actually really simple. Try this: 3/8 + 1/4. Give your answer in its simplest form. First, we need a common...

Percentages, fractions and decimals

First of all, we need to know how to convert between percentages, fractions and decimals: Percentage - divide by 100 - Decimal - place...

Dividing in a given ratio

Let's say we're given this question: Divide £108 in the ratio 4:5. So, we now add 4 to 5. 4 + 5 = 9. Now we divide 108 by 9. 108/9 = 12....

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