 Bishops Waltham Infant School

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# Maths

## Subtraction

For the next two weeks, we will be recapping subtraction. When we subtract, take-away or minus, the answer gets smaller because a number has been taken away. You have had plenty of practise using unstructured number lines for addition. Now you are going to use unstructured number lines for taking away.

To subtract confidently, you must be able to count backwards from any number. Remember, numbers are a pattern so if you can count backwards from 10 (9, 8, 7, 6, 5, 4, 3, 2, 1, 0) you can count backwards from any number. Getting the hang of crossing the tens number (eg. 60, 50, 40) is really important.

Look at the covered numbers on the 100 square. Do you know what numbers are hiding underneath? Count backwards from them. Do this again and again with different numbers until you are confident with counting backwards.

## Simple Subtraction

If you are finding the below learning tricky, have a go at these activities.

## Subtracting Ones

Choose these activities if you were focusing on adding ones last week. However, we would like everyone to check that they remember how to subtract ones, using an unstructured number line. Check this by completing Activity 2. Move onto Subtracting Tens when you have completed this activity and if you feel confident. If you are not yet confident with subtracting ones, complete all of the activities here before moving on to subtracting tens.

### Click Activity 4 to have a go at the problems below

If you complete these activities, try Activity 2 and Activity 3 from the ones below.

## Subtracting Tens

If you are confident with subtracting ones, have a go at subtracting tens.

## Number Bonds

By the end of Year 2, you should be able to recall and use addition and subtraction facts to 20 fluently. Practise your number bonds to 20 (or 10) using the link below. Make sure you practise your number bonds to 20 before practising number bonds to 100. Top