﻿Hello there, my name is Miss Hill, and I'm really excited to begin this new unit with you. We are going to be looking at number sense, and today we are going to be linking and applying known facts. So all you'll need today is a pencil, a ruler, and a piece of paper. Clear away any distractions that you might find when you're learning and let's get started. So here on this slide, you can see our lesson agenda. First, we're going to start off with our star words and actions. We then going to be exploring the number 18. After that we're going to be linking numbers and representations we then do our independent task, and then you will do your final quiz for the end of lesson. As I mentioned earlier, please make sure you have a pencil, a piece of paper and a ruler. So take a moment to pause this video make sure you have all three things. Perfect, let's get started. Here we have our star words. So when I say it, I want you to repeat it. Star words, number, is equal to, add, subtract, odd, even, number bond, because, good job. Let's see if you remember these actions. Show me is equal to Show me subtract. Show me because, brilliant, nice job. Every time we hear a star word or we use one of our star words, we need to make sure that we are using the actions. Let's have a look at this number. This is the number 18. And what can you tell me about this number? Here's my top tip, if you are stuck, think of all of the calculations that you could write that would equal this number. So pause the video and write them down. Well done, let's have a look at the ones I came up with. I know that double nine or nine add nine is equal to 18. I also know that 14 add four is equal to 18. I also know that 18 is even. I know that 21 subtract three is equal to 18. I also know that 10 add 8 is equal to 18. I know that three multiplied by six is equal to 18. I know that 18 is a multiple of two, three, six, and nine. I also know that two multiplied by nine is equal to 18. I know that 18 is one more than 17. So for your task now, you are going to put all of these calculations and statements into two columns under the subheading it is. And the second subheading is it's the answer to. For example, 18 is the answer to three multiplied by six. So pause this video and give it a go. Well done, so now we're going to do a bit more of exploring of the numbers. So here we have the number 16. So I know I'm going to have to match the numbers to theirs corresponding number facts, and I'm going to have to draw a picture of some deens to represent the answer. So here is the number 16. I'm going to have a look at the number of facts and see if they match. one ten and three ones, one ten at three ones. So one ten add three ones is equal to 13. That doesn't match up. Lets go to the next one, one less than 17. So 17 subtract one is equal to oh, that's 16, but I'm going to check the last two just in case. Thirteen subtract one is equal to that's 12 that doesn't add up. Let's try the last one. 21 subtract three is equal to, oh, that's 18. That's not 16. So the correct answer is one less than 17. And I know I now need to draw some deens. I know that I can represent 16 as one ten and six ones. So it'll look just like this. So now we have got 18, 12, 11, and 13, and we have four statements along the bottom. One 10 and three ones, one less than 13, ten add one and 21 subtract three. So your task now is to pause this video and work out match up the number with the correct number sentence, and draw the deens representation. Remember to pause this video. Brilliant, well done. Let's have a look at the answers together. So I know that 18 is equal to 21 subtract three. Now I'm going to hide my video so I can share you the deens representation. We know that 12 is one less than 13. We also know that 13 is one 10 and three ones. And we know that 11 is equal to 10 add one. and here our deens representation say 13, we have one 10 and three ones. 12 is one 10, two ones, 11 is one 10 and one one, and 18 is one 10 and eight ones, well done. Give yourselves a big pat on the back. Great job let's continue on with our learning. So here we have the number six, and these are some of the different ways that we can represent six. We have a number line and you can see the number six has been circled on the number line. We have six ones deens, a bag with six oranges in. Here we have five green deens add one yellow deen, which is equal to sixteens in total. Here we have three greens deens, add three yellow deens, which is equal to six in total. Here we've got three multiplied by two, which is the same as double three, which is both equal to six. And then we also have a six sided shape. Here we have some representations of the number eight. But only got three, let's have a look at them together. I have a number line with a number eight that has been circled. I have four yellow counters add four pink counters, which is equal to eight. I also have six blue deens add two red deens. And that is equal to eight also. There's not very many here. Do you think you can pause the video and come up with some more representations? Brilliant, well done. Let's have a look at some I came up with too. We've got nine subtract one. We have 10 subtract two. We have double four or four multiplied by two. We also have a number counter with the number eight on that. So your task today is to show the different ways that you can represent these three numbers. We have the number 15, the number 12, and the number 17. So you need to come up with different calculations are different picture representations for these three numbers. I cannot wait to see what you come up with. So pause the video and get started. Here are some of the answers that you may have come up with for 15. You might have had 10 add five, three multiplied by five, four add 11, 18 subtracts three, 15 multiplied by one, and 20 subtract five. All are equal to 15. For 12 you may have had six add six, six multiplied by two, four add eight, 15 subtract three, 11 add one and double six. For 17, this one I found quite tricky. You may have had 10 add seven, 18 subtract one, 11 add six, 20 subtract three, and 17 multiplied by one. They all equal to 17. Great job, I want if you came up with different ones. If you'd like to please ask your parent or carer to share your work on Twitter, tagging @OakNational and #LearnwithOak. It has been brilliant to learn with you today. Now it's time to go and take the quiz. Good luck and see you again soon, bye bye.

Which of these equations are linked to the number 6 (select 1)

'One ten and three ones' is a representation of the number... (Select 1)

'Double 4' is a representation of the number 8 (Select 1)

Which of these equations represent 10? (Select 1)

Linking and Applying Known Facts

In this lesson, we will link and apply known facts using number sense, and explore different visual representations of numbers and their properties.

Maths

Y3 Maths

Key Stage 2

Year 3

Miss

Exploring Number Sense

Number sense and exploring calculation strategies

Number

THEME

UNIT

Deriving New Facts From Number Bonds (Part 1)

Number names

Recognising the value of each digit in a 2 digit number

Using comparative symbols to compare numbers

Deriving New Facts From Number Bonds (Part 2)

Finding number bonds for numbers up to 20

Applying number bonds within ten to add and subtract

Applying number bonds within twenty to add and subtract

Adding and subtracting using round and adjust

Using round and adjust strategies to subtract and add near doubles

Using an 'adding on' strategy to find the difference

Using bar models to solve word problems (Part 1)

Using bar models to solve word problems (Part 2)

Application Lesson

If I know that 2 + 9 = 11, then I know... (select 1)

111 is the same as 11 groups of ten and  one

45 < 46,  True or False?

6 + 2 = 8 - Which equation shows 'one more'

If I know that 6 = 4 + 2 and 5 = 3 + 2, then I can use these facts and say that 65 - 42 = 23.

Using round and adjust and mental strategies, 42+ 46 =

If I have £1 to spend in a shop and I spend 68p- how much change will I receive?

Sharon had £20 to spend in the gift shop. She bought a tea towel for £8 and a mug for £7. How much change did he get?

Which is the greater number?

There will be more number bonds for 7 than 8

Lesson overview:Exploring Number Sense

Core Content

Number sense and exploring calculation strategies: