Why does 10 × 10 = 100?

Because adding 10 10's together makes 100.

That is, because 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100.

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Keep practicing
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144

Why does 10 × 10 = 100?

Because adding 10 10's together makes 100.

That is, because 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100.

Keep practicing