First Lesson: What you've learned

What you've learned

You finished the First Lesson. Here is what you learned.

• Names and letters We gave the pet cup and the blocks names, and a letter to write for each.
• Measurement A quantity and a unit together, like 3 blocks. A number without a unit has no meaning.
• + for and In the language of math, we write + where we would say and.
• Make it Balance Making the two sides equal is the first principle in algebra.
• Equations We wrote down what we saw on the scale as an equality, then guessed what was in the cup.
• Getting it by itself Taking the same from both sides keeps the scale balanced, until the cup is by itself and we can read what it holds.