Скачать или смотреть Comparative Relational Thinking = Algebra - Part II: Subtraction

Comparative Relational Thinking = Algebra

4 Main Steps: C. R. B. C.
1) Compare
2) Relate
3) Balance
4) Check work!

1) Compare
Start with the number on the side with the variable then ask "Is this an Addition or Subtraction problem?"
Addition - choice does not matter - choose whatever number is closest to it on the opposite side of the equation to compare
Subtraction - choice matters - compare numbers in the same locations on the opposite sides of the equation


2) Relate the 2 numbers
How are they related? How can you make them the same?

3) Balance
Ask: "Is this an Addition or Subtraction problem?"
Addition
Balance = opposite operations on same side of equation

Subtraction
Balance = same operations on same side of equation

4) Always check work!