Lesson 4: Practice Problems

Problem 1

Select all of the numbers that are greater than $- 5$ .

1.3
$- 6$
$- 12$
$\frac{1}{7}$
$- 1$
$- 4$

Problem 2

Order these numbers from least to greatest:

$\frac{1}{2}$
0
1
$- 1 \frac{1}{2}$
$- \frac{1}{2}$
$- 1$

Problem 3

Here are the boiling points of certain elements in degrees Celsius:

List the elements from least to greatest boiling points.

Argon: -185.8
Chlorine: -34
Fluorine: -188.1
Hydrogen: -252.87
Krypton: -153.2

Problem 4 From Unit 7 Lesson 2

Explain why zero is considered its own opposite.

Problem 5 From Unit 6 Lesson 9

Explain how to make these calculations mentally.

$99 + 54$
$244 - 99$
$99 \cdot 6$
$99 \cdot 15$

Problem 6 From Unit 4 Lesson 11

Find the quotients.

$\frac{1}{2} \div 2$
$2 \div 2$
$\frac{1}{2} \div \frac{1}{2}$
$\frac{38}{79} \div \frac{38}{79}$

Problem 7 From Unit 3 Lesson 4

Over several months, the weight of a baby measured in pounds doubles. Does its weight measured in kilograms also double? Explain.