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Home > MC1 > Chapter 9 > Lesson 9.3.1 > Problem 9-127


Compute without a calculatorWithout a calculator, simplify each of the following expressions.

  1. Try doing this one without making any calculations on paper. What is ?

  2. Here, you are subtracting 

    Which are like parts?
    Can you find the difference in your head?

  3. It might be useful to think of this as