Odd and Even

Objectives

To Identify properties of numbers and to use this to sort them.

Resources

Abacus Workbook 2 | Interactive 0-100 grid (Mathsframe)

Vocabulary

odd | even | between | greater than | less than

Today's Lesson

Introduction

EXPLORE - Interactive 0-100 grid (Mathsframe)

Identify the number 24.

Ask: ‘What can we say about this number – what are its properties? Can you think of anything else?’

Draw out statements such as:

It’s even.
It’s between 20 and 30.
It’s a 2-digit number.
It’s greater than 20.
It’s not in the 10 times table.

Main Activity

Now show the following clues for a mystery number:

I am less than 40.
I am greater than 25.
I am in the 5 times table.
I end in 5.
What am I?

Work through the clues together, crossing out on the 100 square (using grey squares on the interactive grid to hide them) those numbers it can’t be until there is only one number left. I am 35!

Repeat with these clues:

I am less than 60.
I am greater than 49.
I am a multiple of 2.
I end in 8.
What am I?

Again, work through the clues together, crossing out those numbers it can’t be until there is only one number left. I am 58!

Extra Challenge

Ask your student to think of their own mystery number. Ask them to write down clues they could give to the number.

Workbook

To help your student recap upon previous learning from this course, please ask them to complete the activities on page 29 of Abacus Workbook 2.

Citations

[1] mathsframe.co.uk