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Home > CC1 > Chapter 1 > Lesson 1.2.3 > Problem 1-70

1-70.

How many pennies are represented by each expression below? Homework Help ✎

  1. Remember to multiply first, then add.

    23 pennies

  2. This one is similar to the one above.

  3. One student, Christy, did it this way:

    (2)(3) = 6
    6 + 5 = 11
    11 + 4 = 15
    15 × 2 = 30

    What did Christy do wrong?

    Make sure you do what is inside the parentheses first.

    19 pennies