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Grown-ups
Adding with Regrouping
Level 1 · 2-digit + 2-digit
Level 2 · 2-digit, regroup twice
Level 3 · 3-digit + 2-digit
Level 4 · 3-digit + 3-digit
Level 5 · 3-digit, regroup twice
Level 6 · 3-digit, regroup twice
Level 7 · 4-digit + 3-digit
Level 8 · 4-digit + 4-digit
Level 9 · 4-digit, regroup 3 times
Level 10 · Three 3-digit numbers
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