Why does 10 x 1 = 10?

Because adding 10 1's together makes 10.

That is, because 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 110 = 10.

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Keep practicing
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120
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144

Why does 10 x 1 = 10?

Because adding 10 1's together makes 10.

That is, because 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 110 = 10.

Keep practicing