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Elementary Archive

Browse Elementary Subtraction
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Selected answers to common questions:
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    Order of operations.
    Number sentences.
    Subtraction with borrowing/regrouping.

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"Subtraction" and "Negative"--Same Sign, Different Concepts? [12/14/2005]

Why do we use "-" to mean both "subtraction" and "negative", when those are two different concepts?

Subtrahend and Minuend [03/10/1997]

What are subtrahend and minuend? I think they have to do with subtraction.

Take Aways [03/28/2002]

56 - 18 = ? I don't know how to do it.

Teaching Borrowing in Subtraction [03/12/1997]

What kind of suggestions do you have for manipulatives?

Teaching Children to Subtract [08/30/2005]

I am having a hard time trying to teach my 7 year old how to subtract numbers in the teens minus single digits, such as 14 - 7 or 17 - 9. I just think you have to remember them by heart. Is there an easier way?

Using Addition and Subtraction to Check Answers [02/25/2003]

How can you use addition to check subtraction? How can you use subtraction to check addition?

Why Is Mental Math Important? [03/25/2004]

How can I convince a 14 year old girl who is in 8th grade the importance of mental math? I think that skills like mentally adding and subtracting 2 digit numbers and being able to estimate multiplying 2 digit large numbers are critical. My daughter's teacher says that such skills aren't needed because of calculators and computers.

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