Stage 1 · Unit 25 / 30 · Numbers & Operations
Teen minus a digit
If you know 6 − 4 = 2, you know 16 − 4 = 12. Subtract the ones and keep the ten.
★ 0 / 9 · 0/3 steps done
▶ Start · Step 1If you know 6 − 4 = 2, you know 16 − 4 = 12. Subtract the ones and keep the ten.
★ 0 / 9 · 0/3 steps done
▶ Start · Step 1