Teacher2Teacher Q&A #8469

Calculator activities

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From: Gail (for Teacher2Teacher Service)
Date: Apr 16, 2002 at 06:16:48
Subject: Re: Calculator activities

Here is a game called "wipeout" that helps students practice place value. Have them all key in the same number, something easy to remember, like 987,654,321 Then ask them to "wipeout" one of the digits without changing any of the other digits. When they finish their turn, there should be a new number, 987,605,432. See how the 5 has been "changed" into a 0? Here is what usually happens at first... Ask them to "wipeout" the 5. Many students will just press "-" and "5" the first time they try to solve this problem. They will end up with 987,654,316, and be very surprised. They should key the beginning number back into their calculators and try again. Eventually they will discover that they need to use the place value as they subtract, so "-" "50,000" will wipe out the 5. You can also use this with decimal place value. Even the strongest students have to think a bit before they gain automatic response. -Gail, for the T2T service Thanks for visiting our on-line community. Visit Teacher2Teacher again at http://mathforum.org/t2t/

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