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For the multiples of nine up to 90... Hold your hands out in front of you. Counting from the little finger on your left hand - bend the finger of the multiple you're trying to work out. The number of fingers to the left form one number and the ones to the right form the other. For example - suppose you needed to work out what 3 x 9 is... bend the middle finger of the left hand out of the way. You now have 2 fingers to the left of the 'gap' and 7 to the right. 3 x 9 = 27. This method works for the multiples up to and including 90.

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12y ago

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