**Year 4 Maths – Understanding 10ths and 100ths** *KS2 Revision*

## What you need to know

**Things to remember:**

- A fraction is just a division, with the top number divided by the bottom number.
- We get
**10**ths by dividing by 10. - We get
**100**ths by dividing by 100.

Let’s just remind ourselves of the fancy names of the numbers in a fraction:

\frac{4}{10} = \frac{\leftarrow Numerator}{\leftarrow Denominator}

Remember, a fraction is just another way of writing a division question! We divide the top number by the bottom number!

\frac{7}{10}=7\div10

\frac{3}{10}=3\div10

\frac{9}{10}=9\div10

\frac{4}{10}=4\div10

This is the same for the other way, we can write a division as a fraction!

5\div10=\frac{5}{10}

6\div10=\frac{6}{10}

9\div10=\frac{9}{10}

10\div10=\frac{10}{10}

Like halves we divide by 2, for thirds we divide by 3, etc. we divide by 10 to make **10**ths and by 100 to get **100t**hs!

Let’s look at this for **100**ths!

\frac{5}{100}=5\div100

\frac{12}{100}=12\div100

\frac{56}{100}=56\div100

\frac{87}{100}=87\div100

But we can write the divisions as fractions as well:

27\div100=\frac{27}{100}

3\div100=\frac{33}{100}

67\div100=\frac{67}{100}

96\div100=\frac{96}{100}

## Example Questions

**Question 1:** What does \dfrac{9}{10} mean?

A: 9\div10

B: 10\div9

C: 100\div

D: 10\div9

E: 10\div100

\dfrac{9}{10} means 9\div10

**Question 2:** What does \dfrac{12}{100} mean?

A: 12\div10

B: 10\div12

C: 100\div12

D: 12\div100

E: 10\div100

\dfrac{12}{100} means 12\div100