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Head-scratching grade school math sum divides people... can you remember the golden rule?
A grade-school math problem has left people perplexed, can you solve the simple-looking equation in just 30 seconds? The sum, posted to X by BreakTheSilos, that regularly shares brainteasers, is: 12 - ...
May 7, 2026-The May issue of Mathematics Teacher: Learning and Teaching PK-12 (MTLT) is now available.
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