Science of Math
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If one thing equals another, the second equals the first
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Principle, equality
Builds on
A thing is equal to itself
Leads to
Putting two things together weighs the same in either order
Lessons
Lesson 3: If A = B, then B = A · Swap the blocks.
Lesson 3: If A = B, then B = A · Fill in the blank
Lesson 3: If A = B, then B = A · The third identity
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