Estimation and Inverse Operations for Answer Checking (Cover/Homework/Extension/Planning)
A resource on using estimation and inverse operations for checking answers (addition and subtraction), complete with detailed explanation, plentiful exercises, word problems, answer key and suggested feedback. Ideal for a cover lesson, intervention, homework or extension.

PDF and Word files provided.
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  • Estimation-and-Inverse-Operations-for-Answer-Checking.pdf
  • Estimation-and-Inverse-Operations-to-Check-Answers.docx

About this resource


Created: Dec 13, 2017

Updated: Feb 22, 2018

pdf, 716 KB


docx, 19 KB


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