**Function Machine Worksheet**. When students complete a function machines worksheet their task will be to determine the input the output or the operation taking place inside. It contains a diagram that represents a machine that takes a starting number called an input applies a certain rule or formula and delivers the answer called an output.

Aimed at Levels 2 and 3 it focuses on 1-step function machines using add and subtract only. Answer all Questions. If you input 3 into the function machine then what is the output.

### Diagrams are NOT accurately drawn unless otherwise indicated.

Our Addition to 20 Functions Machine Worksheet focuses on addition and can be a great way for students struggling with the addition function to practice. You could also try this Subtraction within 20 Functions Machine Worksheet. If you input 3 into the function machine then what is the output. Creating Function Machines You may be asked to create a function machine from an equation given.