Why does 9 x 11 = 99?

Because adding 9 11's together makes 99.

That is, because 111 + 112 + 113 + 114 + 115 + 116 + 117 + 118 + 119 = 99.

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Keep practicing
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Why does 9 x 11 = 99?

Because adding 9 11's together makes 99.

That is, because 111 + 112 + 113 + 114 + 115 + 116 + 117 + 118 + 119 = 99.

Keep practicing