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

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

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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.

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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.

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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

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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

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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

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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

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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

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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 + 2 + 3

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

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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

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

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Prime Numbers 23456 789101112 131415161718 192021222324 252627282930 313233343536 373839404142 434445464748 495051525354 555657585960 616263646566 676869707172 737475767778 798081828384 858687888990 919293949596 979899100101102 103104105106107108 109110111112113114 115116117118119120

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123456 789101112 131415161718 192021222324 252627282930 313233343536 373839404142 434445464748 495051525354 555657585960 616263646566 676869707172 737475767778 798081828384 858687888990 919293949596 979899100101102 103104105106107108 109110111112113114 115116117118119120

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