# Number (fractions): Animal Classification

## The Problem

Professor Greenfingers drew a bar chart (opposite) to show the number of vertebrates and invertebrates that he spotted in his garden one summer’s day.

As a keen mathematician, he decided to record some statements (below) about the animals that he spotted using his knowledge of number and fractions.

**Which of the professor’s statements are true? Which are false? How do you know? **

Professor Greenfinger’s statements

“A quarter of all the invertebrates that I spotted are spiders.”

“Three quarters of all the animals that I spotted are invertebrates.”

**Did you know?**

When feeling threatened, ladybirds will secrete an oily, foul-tasting fluid from the joints in their legs.

## Visualising the Problem and Getting Started

Megan said, “First of all, I will record the number of invertebrates and the number of vertebrates that Professor Greenfingers spotted in his garden.”

What will you do first and why?