# Fractions of quantities: L3: bat volcano

## The Maths Bit!

In this exciting lesson, you will have an opportunity to show your understanding of halves, thirds, quarters, fifths and sixths, whilst solving a variety of bat-related fraction problems. You will also be learning more about bats and their incredible flying and hunting abilities.

**Useful prior knowledge: **

- To know what is meant by the numerator and the denominator in a unit fraction.
- To be able to recognise a half (1/2), a third (1/3) a quarter 1/4), a fifth (1/5) and a sixth (1/6).
- To be able to calculate unit fractions of small quantities (e.g. 1/2 of 8, 1/4 of 12 etc.)

**Did you know?**

Not all bats are nocturnal (meaning that they’re awake at night). However, those that are can find flying insects to eat (such as mosquitos) by letting out high-pitched sounds and listening to their echoes. This is called echolocation.

## Whiteboard Challenges

*Divide the bars and draw counters to solve the problems below.*

Here is a drawing of some of the mosquitoes that were flying around outside the Bat Volcano.

1) In less than a minute, a young bat (pup) ate 1/4 of the mosquitoes shown in the picture.

**How many mosquitoes did the pup eat?**

2) 1/3 of the mosquitoes that are shown in the picture are male.

** How many mosquitoes are male?**

3) 1/6 of the mosquitoes shown in the picture had fed on the blood of a bat.

** How many mosquitoes had fed on the blood of a bat?**