The Power of Place Value and Operations · Number and Operations

Flexible Addition and Subtraction

Moving beyond standard algorithms to use mental strategies and estimation for solving problems.

Key Questions

  1. 1When is it more helpful to estimate an answer before calculating the exact total?
  2. 2How can breaking a number into its expanded form make subtraction easier?
  3. 3Why do different strategies lead us to the same sum?

NCCA Curriculum Specifications

NCCA: Primary - NumberNCCA: Primary - Operations
Class/Year: 3rd Class
Subject: Mathematical Explorers: Building Number and Space
Unit: The Power of Place Value and Operations
Period: Number and Operations

Suggested Methodologies

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