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Remember that the digits of your answer should all add up to 9. Remember that the tens digit of 9 x some number will be some number minus one.

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The nines times table has the great trick that the digits of your answer always add up to 9. This works as follows:  9 x 1 = 09. 0 + 9 = 9 9 x 2 = 18. 1 + 8 = 9 9 x 3 = 27. 2 + 7 = 9 9 x 4 = 36. 3 + 6 = 9. etc. For example, the tens digit of 9 x 3 will be 3-1, or 2. Therefore the answer to 9 x 3 should begin with 2. Use this pattern to help keep you on track: if you find that your answer to 9 x 2 begins with a 4 (and not a 1), you know you have gone astray somewhere.