### Home > CC1 > Chapter 1 > Lesson 1.2.3 > Problem1-70

1-70.

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

1. $3+4(5)$

Remember to multiply first, then add.

23 pennies

2. $4(3)+7$

This one is similar to the one above.

3. $2(3)+5+4(2)$

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