Stage 1 · Unit 19 / 30 · Numbers & Operations
Teen plus a digit
If you know 3 + 4 = 7, you know 13 + 4 = 17. Add the ones, then add the ten.
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▶ Start · Step 1If you know 3 + 4 = 7, you know 13 + 4 = 17. Add the ones, then add the ten.
★ 0 / 9 · 0/3 steps done
▶ Start · Step 1