论文信息 - Mental Computation and Estimation: Past, Present, and Future

Mental Computation and Estimation: Past, Present, and Future

buy? 2. A car averages 55 miles per hour on the interstate highway. About how far will it travel in 31/2 hours? 3. The grocery store ticket reports a total of $19.50 for three gallons of milk and two loaves of bread. Is that reasonable? 4. You pay for a purchase of $1.83 with a $5 bill. About how much change should you receive? 5. You receive a restaurant bill for $18.95. About how much should you tip the waiter? 6. The calculator reports the sum of 1,856 and 2,743 to be 5091008. Could that be correct?

Robert E. Reys

[1] A. R. Congdon. The Reorganization of Mathematics in Secondary Education. , 1924 .

[2] George W. Bright. Estimation as Part of Learning to Measure. , 1976 .

[3] Edwin W. Schreiber. The National Council of Teachers of Mathematics , 1936 .

[4] Robert E. Reys,et al. Teaching and Assessing Computational Estimation Skills , 1981, The Elementary School Journal.

[5] Mark J. Driscoll. Research Within Reach: Elementary School Mathematics , 1982 .

[6] Robert E. Reys,et al. Teaching Kids to Estimate. , 1982 .

[7] Lynn T. Goldsmith,et al. Skill in Estimation Problems of Extent and Numerosity. , 1982 .

[8] Harold L. Schoen. Instruction in Estimating Solutions of Whole Number Computations , 1981 .