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Cumming, J. Joy; And Others – Focus on Learning Problems in Mathematics, 1994
Tests of (n=107) third through sixth graders' basic addition facts found that 34% of errors involved the addition of zero and 83% of the remaining errors involved at least one of the digits 7, 8, or 9 when the other addend was 4 or more. (20 references) (MKR)
Descriptors: Addition, Arithmetic, Computation, Elementary Education
Anderson, Ann – Focus on Learning Problems in Mathematics, 1995
Tests of (n=105) ninth-grade algebra students involving the addition and multiplication of monomials found that common, systematic errors made when multiplying monomials were related logically to the symbolism used and the algebraic convention of using an implicit 1 as an exponent. (16 references) (MKR)
Descriptors: Addition, Algebra, Exponents (Mathematics), Grade 9
