3. There are 6 apples on the tree. 2 fall off. How many are left? 6-2=6-2= 4 apples 4

4. 5 7 - 1 9 At a party 57 balloons fly down. 19 of them burst! How many are left? 1 83 4 balloons

5. 3 2 - 1 7 The shopkeeper has 32 Easter eggs. He sells 17. How many are left? 1 5 2 eggs 1

6. Tom sees 24 blue and orange fish. 9 are orange. How many are blue? 2 4 - 9 1 5 1 fish 1

7. Before Opened Now l On the tree there are 9 presents. The children have already opened 6. How many were there on the tree first? -69 15 ?

8. -14 14 people get on the bus How many people were there in the queue before? 9 people are left in the queue ? = 9 23

9. -5 12 input Work out the output ? 7 -4 23 ? 19

10. -5 23 input Work out the output ? 18 -4 18 ? 14

11. -6 Work out the input output ?11 -4 ?15 17 19

12. -3 Work out the input output ?28 -8 ?12 31 20

13. input output input output The Subtraction Machine -5 26?21 13 8 ? ? ?36 14 19 41

14. input output input output The Subtraction Machine -7 13?6 2417 ? ? ?31 2229 38

15. input output input output The Subtraction Machine -6 44?38 2923 ? ? ?9 1723 15

16. The End