# Fluent adding and subtracting within 100

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and the relationship between addition and subtraction

Builds on: Adding within 100 (hard, https://ai.page/c/adding-within-100/en.md), Fluent adding and subtracting within 20 (hard, https://ai.page/c/fluent-adding-and-subtracting-within-20/en.md)

Concept id: fluent-adding-and-subtracting-within-100. Subject: maths. Licence: CC BY-SA 4.0.

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