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Struggling with the nine times table? I have a failsafe method (www.theguardian.com)
submitted 3 months ago by to c/nottheonion@lemmy.world
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Apparently, nines are the hardest to grasp for primary school children. If only they’d learned how to cheat like me, says Adrian Chiles

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[–] 27 points 3 months ago (4 children)

The trick I was taught is that the sum of all two digit multiples of nine add up to nine. Then you just take the number you want to multiply times none and subtract 1.

For example if you want to multiply times 8, the tens place is 7 and the ones place must add up to 9, so 2. 7+2=9, so 9x8=72.

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