# Multiplication (tables): 2x: bipeds

## Learning Objective

We are learning how to multiply by 2.

Context: bipeds

https://www.bbc.co.uk/programmes/p03slb3g/player

Credit: BBC Two - Natural World

## Clip Description

Legs support an animal’s body and allow it to move. Humans only require two legs to run, walk and jump. Any animal that moves in this way is called a biped. Birds are bipeds as are some mammals that hop such as kangaroos and wallabies. Do you know of any other words that start with the prefix ‘bi-?’  A bicycle is a two-wheeled mode of transport and binoculars have two lenses that enable you to see things that are far away.

In this fascinating clip, we meet a variety of Australian bipeds, that include Chris ‘Brolga’ Barns. Chris does an amazing job rescuing baby kangaroos that have been orphaned. Chris and his wife share their home with the joeys as well as with wombats, emus and a camel! Watch the clip closely. How many bipeds are you able to count?

## Quick Number Challenge

If you multiply a number by 2, the number will become twice as much. We say that the number has ‘doubled.’

Can you use your knowledge of doubling to continue the number sequence below? How far can you go?

1, 2, 4, …