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Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1986
Using factoring as an aid to mental multiplication is illustrated. Other suggestions for teaching mental computation are also included. (MNS)
Descriptors: Computation, Elementary Education, Elementary School Mathematics, Mathematics Instruction
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1987
Use of compatible numbers resulting in easy mental computations is described, along with related teaching and testing tips. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Estimation (Mathematics), Learning Activities
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1986
Activities on estimation and mental computation are presented. Patterns on a hundred chart, an amazing fact, teaching and testing tips, and other references are included. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Estimation (Mathematics), Learning Activities
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1986
Use of an ancient method of mental calculation with aliquot parts is illustrated. Other tips for helping children reason are also included. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Mathematics Instruction, Mental Computation
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1987
The focus is on suggestions for teaching rounding wisely as an estimation strategy. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Estimation (Mathematics), Learning Activities
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1986
Four ways of knowing about numbers are listed, with direct estimation emphasized. Using perceptual anchors is described, with several teaching tips on their use in estimation. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Estimation (Mathematics), Mathematics Instruction
Peer reviewed Peer reviewed
Reys, Robert E., Ed.; Reys, Barbara J., Ed. – Arithmetic Teacher, 1987
Estimation of measurements is discussed, with a definition, rationale, strategies, teaching suggestions, and several references. (MNS)
Descriptors: Elementary Education, Elementary School Mathematics, Estimation (Mathematics), Mathematics Instruction