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The clever multiplication trick that makes 99 easy

Olivia shares a clever math trick that makes multiplying by 99 much easier. Try it for yourself!
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Simple math equation can be solved using 5th-grade trick, yet many are still stumped — can you figure it out?

You’re never too old to learn something new. People are losing their minds over how simple — yet tricky — an elementary school-level math equation posted on X (formerly Twitter) is. Over the weekend, ...