# 10 More or 10 Less

Mentally find 10 more or 10 less than a given two-digit number without counting

Builds on: One More Each Time (soft, https://ai.page/c/one-more-each-time/en.md), The two digits of a two-digit number (hard, https://ai.page/c/the-two-digits-of-a-two-digit-number/en.md)

Concept id: 10-more-or-10-less. Subject: maths. Licence: CC BY-SA 4.0.

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