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   TOPICS This page:   subtraction    Search   Dr. Math See also the Dr. Math FAQ:   order of operations Internet Library:   subtraction ELEMENTARY Arithmetic    addition    subtraction    multiplication    division    fractions/decimals Definitions Geometry    2-dimensional      circles      triangles/polygons    3D and higher      polyhedra Golden Ratio/ Fibonacci Sequence History/Biography Measurement    calendars/      dates/time    temperature    terms/units Number Sense/ About Numbers    infinity    large numbers    place value    prime numbers    square roots Projects Puzzles Word Problems Browse Elementary Subtraction Stars indicate particularly interesting answers or good places to begin browsing. Selected answers to common questions:     Flashcards/worksheets on the Web.     Order of operations.     Number sentences.     Subtraction with borrowing/regrouping. "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? When in Rome, Know Your Place — Less a Written Notation for It [01/27/2015] An adult wonders how Romans could have developed their rules for subtraction absent place value. Citing their use of the abacus, Doctor Peterson distinguishes between operating with the concept and representing it. 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. Page: [
  
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