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Mathematics · L1 · Fact Families & Related Facts

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How the three numbers in a fact family — 4, 5, and 9 — combine into four related addition and subtraction facts.

by @openstemUpdated Mathematics
🔺 Fact family: 4, 5, 99 is the whole4 and 5 are the parts➕ 4 + 5 = 9 and 5 + 4 = 9➖ 9 - 4 = 5 and 9 - 5 = 4

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