MATHEMATICS

Y1 Calculating 1260

Adding or subtracting 10

Equipment Paper, pencil, ruler Number line

MathSphere

© MathSphere www.mathsphere.co.uk

1260 Adding or subtracting ten Page 2 © MathSphere www.mathsphere.co.uk

Concepts Once children are confident with adding and subtracting numbers up to ten the next stage is to introduce addition of ten to a number. Before doing this children should be confident with counting in the teens. Subtraction develops by taking ten from a teens number. Once again lots of oral work needs to be done with these and children will probably need the aid of a number line to begin with.

1260 Adding or subtracting ten Page 3 © MathSphere www.mathsphere.co.uk

Adding ten

Join the kites to the correct ratties

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1

6 5

9

2

7

11

15 12 16

19 17

1260 Adding or subtracting ten Page 4 © MathSphere www.mathsphere.co.uk

Adding ten

Join the kites to the correct ratties

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

3

5 4

8

0

6

13

14 15 18

16 10

1260 Adding or subtracting ten Page 5 © MathSphere www.mathsphere.co.uk

Add ten

4 7 2 6 1

add 10

add 10

add 10

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add 10

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1260 Adding or subtracting ten Page 6 © MathSphere www.mathsphere.co.uk

Add ten

5 8 3 0 9

add 10

add 10

add 10

add 10

add 10

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1260 Adding or subtracting ten Page 7 © MathSphere www.mathsphere.co.uk

1. 4 + 10 = 2. 1 + 10 = 3. 8 + 10 = 4. 5 + 10 = 5. 2 + 10 =

What a lovely day! Try adding these!

1260 Adding or subtracting ten Page 8 © MathSphere www.mathsphere.co.uk

1. 7 + 10 = 2. 0 + 10 = 3. 3 + 10 = 4. 6 + 10 = 5. 9 + 10 =

Wakey, wakey! Try adding these!

1260 Adding or subtracting ten Page 9 © MathSphere www.mathsphere.co.uk

1. 5 + = 15 2. 3 + 10 = 3. 2 + = 12 4. 8 + 10 = 5. 4 + = 14

Feeling good today, I hope! Find the missing numbers!

1260 Adding or subtracting ten Page 10 © MathSphere www.mathsphere.co.uk

Add ten

1. 1 + = 11 2. 6 + 10 = 3. 9 + = 19 4. 7 + 10 = 5. 0 + = 10

Try to fill in the missing numbers.

1260 Adding or subtracting ten Page 11 © MathSphere www.mathsphere.co.uk

Subtract ten

12 18 13 10 15

subtract 10

subtract 10

subtract 10

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subtract 10

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

1260 Adding or subtracting ten Page 12 © MathSphere www.mathsphere.co.uk

Subtract ten

19 16 17 14 11

subtract 10

subtract 10

subtract 10

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1260 Adding or subtracting ten Page 13 © MathSphere www.mathsphere.co.uk

Subtract ten

1. 12 − = 2

2. 15 − 10 =

3. 11 − = 1

4. 17 − 10 =

5. 10 − = 0

Try to fill in the missing numbers.

1260 Adding or subtracting ten Page 14 © MathSphere www.mathsphere.co.uk

Subtract ten

1. 18 − = 8

2. 14 − 10 =

3. 13 − = 3

4. 19 − 10 =

5. 16 − = 6

Hi! Now try these subtractions.