The Power of Place Value · Number Sense

Estimating and Rounding

Learning to make sensible guesses and rounding numbers to the nearest ten.

Key Questions

  1. 1When is an estimate more useful than an exact answer in real life?
  2. 2Why do we usually round 5 upwards to the next ten?
  3. 3How can we tell if our estimate is reasonable or way off?

NCCA Curriculum Specifications

NCCA: Primary - NumberNCCA: Primary - Estimation
Class/Year: 2nd Year
Subject: Foundations of Mathematical Thinking
Unit: The Power of Place Value
Period: Number Sense

Suggested Methodologies

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