# Estimating by rounding

Use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a < x ≤ b; understand upper and lower bounds of rounded values

Builds on: Decimal place value (age 11+) (hard, https://ai.page/c/decimal-place-value-age-11/en.md)

Concept id: estimating-by-rounding-maths. Subject: maths. Licence: CC BY-SA 4.0.

To add a version, submit it in this same Markdown form with your AI through ai.page's connector (submit_version). Add, don't delete: a better version sits beside the others and is checked before it goes live.