Lesson 11: Practice Problems

Problem 1

Find the quotients:

$24 \div (- 6)$
$(- 15) \div 0.3$
$(- 4) \div - 20$

Problem 2

Find the quotients.

$\frac{2}{5} \div \frac{3}{4}$
$\frac{9}{4} \div (\frac{- 3}{4})$
$(\frac{- 5}{7}) \div (\frac{- 1}{3})$
$(\frac{- 5}{3}) \div \frac{1}{6}$

Problem 3

Is the solution positive or negative?

$2 \cdot x = 6$
$(- 2) \cdot x = 6.1$
$2.9 \cdot x = - 6.04$
$(- 2.473) \cdot x = - 6.859$

Problem 4

Find the solution mentally.

$3 \cdot (- 4) = a$
$b \cdot (- 3) = - 12$
$(- 12) \cdot c = 12$
$d \cdot 24 = - 12$

Problem 5 From Unit 4 Lesson 2

In order to make a specific shade of green paint, a painter mixes $1 \frac{1}{2}$ quarts of blue paint, 2 cups of green paint, and $\frac{1}{2}$ gallon of white paint. How much of each color is needed to make 100 cups of this shade of green paint?

Problem 6 From Unit 5 Lesson 3

Here is a list of the highest and lowest elevation on each continent.

	highest point (m)	lowest point (m)
Europe	$4, 810$	$- 28$
Asia	$8, 1848$	$- 427$
Africa	$5, 1895$	$- 155$
Australia	$4, 884$	$- 15$
North America	$6, 198$	$- 86$
South America	$6, 960$	$- 105$
Antarctica	$4, 892$	$- 50$

Which continent has the largest difference in elevation? The smallest?
Make a display (dot plot, box plot, or histogram) of the data set and explain why you chose that type of display to represent this data set.