JAXILLMIND FAMILY · AXILL · GRADE 2 · 2.OA.B.2
ADD AND SUBTRACT WITHIN 20, FLUENTLY
L1 · Remember
What is 13 - 6?
Level 1
Right 0
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Learn this first
Adding is counting on; subtracting is counting back.
Numbers are positions on a line, so + moves right and − moves left. Ten is a friendly stop: 8+5 is 8+2 to reach 10, then 3 more.
Example: 8 + 5 → 8 + 2 = 10, then + 3 = 13.
Tap Start to play — spot the answer!
Keep going — this game grows with you
- L1 RememberRecall the fact.
- L2 UnderstandExplain what the number means.
- L3 ApplyUse it to solve a problem.
- L4 AnalyzeBreak the problem into parts.
- L5 EvaluateJudge whether an answer is sound.
- L6 CreateBuild a problem of your own.
Starts at L1 · climbs to L6 — analyze, evaluate and create, not just remember.
TTCF — capability · time bar · failure mode · detection
| Capability | TTC | Failure mode | Detection |
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Source: products/xml/games/family/axill-math-g2-L1.xml v0.1 · engine "choice" · compiled by gen-brain-game.mjs · gated by check-brain-game.mjs