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This simple math trick makes multiplying by 9 easy

Multiplying by 9 doesn’t have to be difficult. Check out this clever math trick that makes the calculation surprisingly ...
Add Yahoo as a preferred source to see more of our stories on Google. It seemed that many were quick to figure out the equation, while others definitley struggled. You're never too old to learn ...
Add Yahoo as a preferred source to see more of our stories on Google. Math shouldn't be harder than finding the last matching sock in your laundry. These clever shortcuts convert head-scratching ...