Questions:

  1. What are expressions?   [Answer]

  2. How do we know which operations in the expression to calculate first?   [Answer]

  3. How can the normal order of operations be changed?   [Answer]

  4. Calcuate the result stored in answer from the following expressions.   [Answer]
    1. answer := 5 + 6 * 10 - 1
    2. answer := 5 + 6 * (10 - 1)
    3. answer := 5 + (6 * 10 - 1)
    4. answer := (5 + 6) * 10 - 1
    5. answer := (5 + 6) * (10 - 1)