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Knights, George – Mathematics Teaching, 1973
Different methods of subtracting are described; the equal additions and the decomposition methods are discussed in detail. (DT)
Descriptors: Algorithms, Elementary School Mathematics, Instruction, Mathematics Education
Download full textWiles, Clyde A.; And Others – 1972
Two sequences of activities were developed to provide instruction on the algorithms for addition and subtraction of two-digit numbers. In the integrated sequence (I) the mechanics of "carrying" and "borrowing" were treated as a single process "regrouping." In the sequential treatment (S) the addition algorithm was developed before the subtraction…
Descriptors: Addition, Algorithms, Arithmetic, Curriculum
Wiles, Clyde A.; And Others – 1972
Two sequences of activities were developed to provide instruction on the algorithms for addition and subtraction of two-digit numbers. In the integrated sequence (I) the mechanics of "carrying" and "borrowing" were treated as a single process "regrouping." In the sequential treatment (S) the addition algorithm was developed before the subtraction…
Descriptors: Addition, Algorithms, Arithmetic, Curriculum
Peer reviewedIkeda, Hitoshi; Ando, Masue – Arithmetic Teacher, 1974
Descriptors: Algorithms, Elementary School Mathematics, Instruction, Manipulative Materials
Peer reviewedCacha, Frances B. – Arithmetic Teacher, 1975
A modified method of regrouping the minuend for subtraction is described. This more flexible method decreases the number of steps in the subtraction process and in checking the regrouping. (SD)
Descriptors: Algorithms, Elementary Education, Elementary School Mathematics, Instruction
Peer reviewedJohnson, Paul B. – Arithmetic Teacher, 1972
Descriptors: Algorithms, Elementary School Mathematics, Instruction, Mathematical Enrichment
Peer reviewedHolmes, 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
Peer reviewedHoppe, Ruth C. – Arithmetic Teacher, 1975
The author taught one group using the traditional subtraction algorithm and one using an equal additions algorithm. Students in the latter group showed greater success than the former. (SD)
Descriptors: Algorithms, Curriculum, Elementary Education, Elementary School Mathematics
Peer reviewedHoffman, N. – Australian Mathematics Teacher, 1978
A current method of teaching long division using repeated subtraction is analyzed as being an example of a sound mathematical method that falls into disrepute when it results in unnecessary, length calculations. (MP)
Descriptors: Algorithms, Concept Formation, Division, Elementary Education
Peer reviewedWeill, Bernice F. – Arithmetic Teacher, 1978
A concrete approach to subtraction problems with minuends to 19 is presented. (MP)
Descriptors: Algorithms, Elementary Education, Elementary School Mathematics, Instruction
Peer reviewedCleminson, Robert A. – Arithmetic Teacher, 1973
Descriptors: Algorithms, Elementary School Mathematics, Instruction, Mathematics Education
Peer reviewedLogan, Henrietta L. – Arithmetic Teacher, 1978
A six-step method of teaching subtraction by renaming is presented, using money as the learning vehicle. (MP)
Descriptors: Algorithms, Elementary Education, Elementary School Mathematics, Instruction
Peer reviewedSchwartzman, Steven – Arithmetic Teacher, 1975
A subtraction algorithm for numbers having several digits is described. The algorithm requires that, for digits in the same place, the smaller is always subtracted from the larger. (SD)
Descriptors: Algorithms, Basic Skills, Elementary Education, Elementary School Mathematics
Peer reviewedHutchings, Barton – Arithmetic Teacher, 1975
A new subtraction algorithm is described and illustrated. Research by the author has shown the method to be easier for low achievers, as well as useful as enrichment for average students. (SD)
Descriptors: Algorithms, Elementary Education, Elementary School Mathematics, Enrichment
Peer reviewedSpitler, Gail – Arithmetic Teacher, 1979
Allowing students to examine different ways of performing an operation is suggested as a means of increasing their understanding. (MP)
Descriptors: Addition, Algorithms, Computation, Concept Formation
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