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Using the TI-73: A Guide for Teachers

Number Sense

Activity—Part A

Whole Class

1.Demonstrate to your students how to roll dice on the TI-73 to get 4 numbers. Record the 4 numbers.

a.Go to the Home screen.

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b.Select dice from the MATH PRB menu, and paste it to the Home screen.

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c.Enter the number of dice you want to roll at one time.

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You now have 4 numbers.

d. Record the 4 numbers on the transparency.

2.Have students use each of the 4 numbers once, along with any operations symbols (and grouping symbols, when needed), to write an expression that has a value of 1.

Example If your 4 numbers were {4 3 4 5}, an expression would be 1 = (5 - 3) - (4/4).

3.Record one of these expressions on the transparency. Ask if anyone has a different expression. Record these, also.

4.Repeat this procedure to write an expression equal to 2.

5.Continue the demonstration until students understand what to do.

Students may use the TI-73 to find the expression or to check the value of the expression.

Example If the 4 numbers are {4 3 4 5}, and the expression is 1 = (5 - 3) - (4/4), then enter

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D Q F Q E b.

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