x6, x7, x8, x9
x9 is x10 minus one group.
What this skill is
Automatic recall of facts frees working memory for the actual problem. The order matters: strategy first, then speed. A fact only enters timed practice once the child can already derive it.
Three ways to teach it at home
- Never time a fact they cannot yet work out by strategy. Timing converts a known strategy into recall; it does not create knowledge.
- Keep it short — two or three minutes — and end on facts they already know.
- Compare them only to their own previous best, out loud, and never to a sibling or a class.
Where this sits in the ladder
Comes after
Questions people actually ask
What grade is "x6, x7, x8, x9"?
It sits in grade 3 in most sequences, and it is aligned to 3.OA.C.7. In Ladderbug it opens once x3 and x4 is solid — grade labels are a rough guide, and readiness is what actually matters.
Is this game free?
Yes. This page needs no account, no email and no card, and there are no advertisements. It saves progress in your own browser.
This is one rung of 82.
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