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Algorithms2
Elementary School Mathematics2
Instruction2
Mathematics Education2
Computation1
Division1
Fractions1
Number Concepts1
Rational Numbers1
Subtraction1
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Mathematics in School2
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Holmes, P.2
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Rules of Thumb
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Holmes, P. – Mathematics in School, 1973
Four algorithms for subtraction are described: borrow and pay back,'' equal additiions, shopkeepers' subtraction,'' and decomposition. (DT)
Descriptors: Algorithms, Elementary School Mathematics, Instruction, Mathematics Education
Rules of Thumb
Peer reviewed Peer reviewed
Holmes, P. – Mathematics in School, 1974
The major portion of the article establishes the basis for the stated rule - to divide by a fraction, turn it upside down and multiply. With this background, three justifications for the rule are given. Several possible errors in students' use of the rule are noted. (LS)
Descriptors: Algorithms, Computation, Division, Elementary School Mathematics