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a cool way to know the multiples of 9 is...here I'll show you...

9

18

27

36

45

54

63

72

81

90

18 is backwards 81.27 is backwards 72.36 is backwards 63.45 is backwards 54.hope this helped!!!

(PS:you can also tell cuz the first digit of every number goes up one and the second digit of every number goes down one.)I'm only in like sixth grade too!

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13y ago

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