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Single Function Machine Numbers are entered into a function machine 1, 2, 3, 4 …. What is happening to the numbers? 2, 4, 6, 8 … These numbers come out.

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Presentation on theme: "Single Function Machine Numbers are entered into a function machine 1, 2, 3, 4 …. What is happening to the numbers? 2, 4, 6, 8 … These numbers come out."— Presentation transcript:

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2 Single Function Machine Numbers are entered into a function machine 1, 2, 3, 4 …. What is happening to the numbers? 2, 4, 6, 8 … These numbers come out

3 What is happening? Numbers are entered into a function machine 1, 2, 3, 4 … 2, 3, 4, 5 … These numbers come out

4 What is happening? Numbers are entered into a function machine 10, 20, 30, 40 … 5, 10, 15, 20 … These numbers come out

5 Using the TI-15 Explorer Locate the op1 key This key operates like a function machine. To simulate a function machine that doubles the numbers press x2. Enter 5 into your calculator press. The display should show 10.

6 Using the TI-15 Explorer 2 Use the key to create your own function machine questions. Write your questions on the single function machine worksheet. Remember to keep a copy of your questions and answers. Give a copy of your question sheet to a partner to solve.

7 Reverse Function Machine What happens if the function machine is set in reverse? 1, 2, 3, 4 …. What is happening to the numbers? 2, 4, 6, 8 … These numbers are fed into the machine

8 Reverse Function Machine 2 What happens if the function machine is set in reverse? 1, 2, 3, 4 …. What is happening to the numbers? 2, 3, 4, 5 … These numbers are fed into the machine

9 Reverse Function Machine 3 What happens if the function machine is set in reverse? 10, 15, 20, 25 …. What is happening to the numbers? 20, 30, 40, 50 … These numbers are fed into the machine

10 Linking Forward and Reverse What do you notice happens to the operation when a function machine is set in reverse? Explore your ideas using the key on your TI-15 Explorer calculator

11 Forward and Reverse + and – are inverse operations If the function machine adds 2, then when it is put in reverse it would subtract 2 X and ÷ inverse operations If the function machine multiplies by 10, then when it is put in reverse it will divide by 10

12 What Happens When Two Function Machines Are Joined? 1, 2, 3, 4 …. Test it out using the and keys on your TI-15 Explorer calculator

13 Addition and Subtraction 1, 2, 3, 4 …. What about subtracting and adding? + 5 – 2

14 Multiplication 1, 2, 3, 4 …. Could I replace two function machines with one machine? What single machine could replace the two machines? x 2 x 5

15 Multiplication and Division 1, 2, 3, 4 …. What happens when you join two division function machines? x 10 ÷ 2

16 Prime Numbers

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