# Choosing the right strategy

Select and use appropriate tools and representations strategically, including choosing between mental methods, jottings, formal algorithms, and calculators for arithmetic with multi-digit numbers, decimals, and fractions

Builds on: Measuring length (age 7+) (soft, https://ai.page/c/measuring-length-age-7/en.md), Adding and subtracting (age 7+) (soft, https://ai.page/c/adding-and-subtracting-age-7/en.md), Numbers on a number line (hard, https://ai.page/c/numbers-on-a-number-line-3/en.md)

Concept id: choosing-the-right-strategy. Subject: maths. Licence: CC BY-SA 4.0.

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