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The 9 table is full of patterns. 9 is one less than 10, so 9 × n is 10 × n take away n. And the digits of every answer up to 90 add up to 9.
✓ You passed this lesson’s test.
Pattern — “every answer in the 9 table up to 9 × 10 has digits adding to 9”
Use it for: Any 9 in a sum — and checking: 6 + 3 = 9 shows 63 is in the 9 table.
Check: 9 × 7 = 9 × 5 + 9 × 2 = 45 + 18 = 63, and 6 + 3 = 9 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🌟 Cloud Nine Champ badge when you pass — and a certificate when you finish all 7 lessons of Module 1 · Tables 2–10. You can still take the test without signing in.
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