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Numeracy

Using models

LC To be able to solve word problems using addition and subtraction.

This is the first of four lessons that we will have on the bar model. You might remember bar modelling from Year 2.

To begin with look at the In Focus task. How could you find the correct answer using cubes?

Can you use squares drawn into your maths book or your blended learning book?

Draw 5 squares for 5 cubes(pencils) and 3 squares for the 3 cubes (pencils). 

We do not always have to use one square to represent each unit. We can have a bar to represent 5 pencils and another bar to represent 3 pencils.
Should the second bar be longer or shorter than the first bar? 
Yes, well done๐Ÿ‘, the second bar should be shorter than the first as there are fewer pencils.
Remember when we add we find the total, and add the two parts, which are 5 and 3.๐Ÿ˜€

Let’s look at the next question. 15 + 23 This is similar to the last question, but the numbers have changed.

Can you draw a bar model in your book to represent the problem. Use the bar model from before to help.

Use the column addition to support you with finding the answer.

Then solve these problems in your book.

Please work out the answers to these questions in your book. Remember to show your teacher your work if you are learning from home.

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