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Hannah examined these multiples of 9: 18, 45, 63, 27, 81, 108, 216. she claimed that the sum of the digits in any multiple of 9 will add to 9. do you agree or disagree? justify your decision.
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Hannah examined these multiples of 9: 18, 45, 63, 27, 81, 108, 216. she claimed that the sum of the...
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