One More and One Less 23 09 20

One More and One Less 23. 09. 20

Learning Objective WALT: To identify one more and one less using practical apparatus and pictorial representations. Key Vocabulary: One More, One Less, Numeral, Digit, Numerical Order.

Basic Skills: Maths Warm Up Today, we are going to warm-up our maths brain by representing the numbers 1 – 20 as ‘number blocks’. These should be drawn in ascending numerical order. Make sure you keep this piece of work as we will be using this later on in the lesson too!

Finding ‘One More’ – Thinking Time

Finding ‘One More’ 9 8 6 When we want to find out ‘one more’, we count forwards one. This can also be called adding on one. 5 If I had three cubes and I wanted to find what ‘one more’ than three is, what would I need to do? How many cubes would I have? 3 1 2 4 7

Finding ‘One More’ What is one more than five?

Finding ‘One More’ What is one more than nine? Can you use some objects to find out what one more than nine is?

Finding ‘One More’ 10 10

Finding ‘One Less’ – Thinking Time

Finding ‘One Less’ When we want to find out ‘one less’, we count backwards one. This can also be called taking away one. If I had seven cubes and I wanted to find what ‘one less’ than seven is, how do I find out the answer? I would take away one!

Finding ‘One Less’ What is one less than nine?

Your Task: One More and One Less For your task, you are going to find ‘one more’ and ‘one less’ of the numbers on the following slides. We would like you to use the ‘number blocks’ that you have drawn and the objects that you have been using for your maths work at home to prove your answers! We have done an example on the next slide. Don’t forget to put your work on Seesaw!

6 One Less Find ‘one more’ and ‘one less’ of the number… 7 8 One More

Find ‘one more’ and ‘one less’ of the number… One More One Less 7

Find ‘one more’ and ‘one less’ of the number… 10

Find ‘one more’ and ‘one less’ of the number… 14

Find ‘one more’ and ‘one less’ of the number… 17

Find ‘one more’ and ‘one less’ of the number… 20

Challenge! Choose three numbers above 20 and show me ‘one more’ and ‘one less’. Remember, you need to prove it, either using drawings or objects. Good luck!