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Do you know how to calculate 65² in your head? Use this mental math trick to calculate 65² (65 squared) fast! This is part 29 of our Minute… | Instagram
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10 Math Tricks for Quick Calculations in Your Head | Resilient Educator
10 Math Tricks for Quick Calculations in Your Head | Resilient Educator
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Hate Math? These Mental Tricks Will Have You Multiplying Faster Than Einstein Ever Could! « Mind Hacks :: WonderHowTo