The Equals Sign for Kids: Who Invented It and What It Means

The story of the equals sign for kids: how Welsh doctor Robert Recorde drew two parallel lines in his 1557 book The Whetstone of Witte.

• Why Recorde chose two lines of the same length
• How his book was the first in English to use plus and minus signs too
• Why equals means both sides balance, not the answer comes next
• Quiz questions to answer along the way

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