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Level 5-6 Numbers - Fractions - Addition and Subtraction
What is 1/8 of £20.00?

Level 5-6 Numbers - Fractions - Addition and Subtraction

Addition and subtraction seem easy, right? But KS3 Maths likes to challenge us! This quiz dives into adding and subtracting fractions.

Adding and subtracting fractions isn't as tricky as it seems. Just find their lowest common multiple and give both fractions that denominator. You can only add and subtract if the fractions share the same denominator. That's the number below the line. Fractions have two parts – numerators (the top or first number) and denominators (the bottom or second number).

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For example, to add 2⁄5 and 2⁄3, convert both to 15ths. 2⁄5 becomes 6⁄15 and 2⁄3 becomes 10⁄15. Add them: 6⁄15 + 10⁄15 = 16⁄15 or 11⁄15. Simple once you know how!

Take the quiz below and soon you'll master adding and subtracting fractions. Take your time, think about your answers, and good luck with your KS3 Maths journey!

1.
What is 1/8 of £20.00?
80p
£1.20
£1.25
£2.50
1/8 of £20.00 is the same as 1/4 of £10.00
2.
How many sixths are there in 32⁄3?
12
22
32
42
2/3 is the same as 4/6
3.
What is the lowest common multiple of the denominators in 1/4 + 1/2?
1
2
3
4
4 is the lowest common multiple of 4 and 2, therefore change 1/2 into an equivalent fraction with a denominator of 4
4.
What is the lowest common multiple of the denominators in 3/4 - 1/5?
9
12
18
20
It is the smallest number in the 4 and 5 times table
5.
What is 3/4 - 1/5?
1/20
5/20
11/20
15/20
20 is the lowest common multiple of 4 and 5 so we must convert both fractions to 20ths
6.
For the calculation 1/4 + 1/2, what would you change 1/2 into in order to find the answer?
3/4
2/4
1/4
4/6
The lowest common multiple is 4, and 2/4 is an equivalent fraction of 1/2
7.
How many sixths are there in 35⁄6?
15
17
23
27
There are 18/6 in 3 plus the remaining 5/6 makes 23
8.
What is 1/4 + 1/2?
1/8
2/6
3/4
4/9
4 is the lowest common multiple of the denominators so we can convert 1/2 to 2/4
9.
£6.00 = 1/8 of .......
£48.00
£52.00
£56.00
£62.00
Just multiply £6.00 by 8
10.
What is 3/5 - 1/4?
4/10
4/20
7/10
7/20
20 is the lowest common multiple of 4 and 5 so we convert both fractions to 20ths
You can find more about this topic by visiting BBC Bitesize - Fractions

Author:  Frank Evans
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