Chapter 3, Lesson 1

3-1.A associate operation symbols with words
Which set of words contains a word or phrase that is not represented by the indicated symbol?
(a) sum, increased by, exceeds; +
(b) quotient, divide, double; ÷
(c) difference, less than, diminished by; —
(d) times, product, twice; ×

3-1.B understand the use of grouping symbols
Which of these expressions is not equal to 49?
(a) (—7)2 (b) —72 (c) 1 + 3(42) (d) (—1 — 6)2