Lesson 15: Practice Problems

Problem 1

Evaluate each expression:

$(- 1) \cdot 2 \cdot 3$
$(- 1) \cdot (- 2) \cdot 3$
$(- 1) \cdot (- 2) \cdot (- 3)$

Problem 2

Find the value of each expression.

$\frac{1}{4} \cdot (- 12)$
$(- \frac{1}{3}) \cdot 39$
$(- \frac{4}{5}) \cdot (- 75)$
$(- \frac{2}{5}) \cdot (- \frac{3}{4})$
$\frac{8}{3} \cdot (- 42)$

Problem 3

Fill in the missing numbers in these equations

$(- 7) \cdot$ $= - 14$
$\cdot 3 = - 15$
$\cdot 4 = 32$
$- 49 \cdot 3 =$

Problem 4

These three points form a horizontal line: $(- 3.5, 4)$ , $(0, 4)$ , and $(6.2, 4)$ . Name two additional points that fall on this line.

Problem 5

Order each set of numbers from least to greatest.

1. $4$
2. $8$
3. $- 2$
4. $- 6$
5. $0$
1. $- 5$
2. $- 5.2$
3. $5.5$
4. $- 5 \frac{1}{2}$
5. $\frac{- 5}{2}$

Problem 6 From Unit 5 Lesson 4

Decide whether each table could represent a proportional relationship. If the relationship could be proportional, what would be the constant of proportionality?

Annie’s Attic is giving away $5 off coupons.
original price
sale price
$$ 15$
$$ 10$
$$ 25$
$$ 20$
$$ 35$
$$ 30$
Bettie’s Boutique is having a 20% off sale.
original price
sale price
$$ 15$
$$ 12$
$$ 25$
$$ 20$
$$ 35$
$$ 28$

original price	sale price
$$ 15$	$$ 10$
$$ 25$	$$ 20$
$$ 35$	$$ 30$

original price	sale price
$$ 15$	$$ 12$
$$ 25$	$$ 20$
$$ 35$	$$ 28$