Sharp EL-531RH Teachers Manual page 24

Near Integers
• • • • • • • • • • • Using the activity in the classroom • • • • • • • • • • •
This activity is probably best introduced orally. Students could use the sequence function of the
calculator to generate the multiples of some integers, and could then begin to investigate the
multiples of some decimals.
• • • • • • • • • • • • • • • Points for students to discuss • • • • • • • • • • • • • •
The teacher could ask the students to generate the multiples of 0.314, challenging them to find a
multiple that is nearly an integer. Students can then begin to investigate the situation further.
Further Ideas
• Use this idea to investigate different approximations for . For example, 22/7 = 3.142857,
whereas 3.141593. However, 179/57 = 3.140351.
• Investigate approximations for , or , etc.
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Junior high school