### Combining functions

You can combine two or more functions to change a number in different ways.

input | function 1 | function 2 | output | ||

7 | +4 | x3 | 33 | ||

8 | -3 | x5 | 25 | ||

4 | x4 | -10 | 6 |

Can you work out the output from these combined functions?

input | function 1 | function 2 | output | ||

12 | -3 | x4 | ? | ||

12 | x4 | -3 | ? | ||

8 | +20 | ÷7 | ? | ||

7 | x5 | -5 | ? | ||

-8 | +50 | ÷7 | ? | ||

100 | ÷4 | -5 | ? | ||

28 | +20 | ÷8 | ? | ||

-10 | x5 | +100 | ? | ||

40 | -50 | x7 | ? |

Look at the first two above. The functions are the same but they are carried out in a different order.

Does this make a difference to the output?

Try carrying out some of the other combined functions in a different order to see how the output is affected.