Ohio Mathematics Academic Content Standards (2001)
Number, Number Sense and Operations Standard
Benchmarks (3–4)
J.
Estimate the results of whole number computations using a variety of strategies, and judge the reasonableness.
Principles and Standards for School Mathematics
Number and Operations Standard
Compute fluently and make reasonable estimates
Expectations (3–5)
develop and use strategies to estimate the results of whole-number computations and to judge the reasonableness of such results;