Exam 2: The Integers

A farmer, worried about his fruit trees suffering frost damage, calls the weather service for temperature information. He is told that temperatures will be decreasing approximately $4 ^ { \circ }$ every hour for the next 4 hours. What signed number represents the total change in temperature expected over the next 4 hours? ________ $^ { \circ }$

Add: $- 20 + 20$

Evaluate. $2 + \frac { 24 } { - 6 } + 10 \cdot 6$

What two numbers on a number line are a distance of 10 away from -1?

Add. $- 4 + ( - 4 )$

The first several steps of a chemistry lab experiment are listed below. The experiment begins with a compound that is stored at $- 15 ^ { \circ } \mathrm { F }$ . Step 1. Raise the temperature of the compound $109 ^ { \circ } \mathrm { F }$ . Step 2. Add sulfur and then raise the temperature $80 ^ { \circ } \mathrm { F }$ . Step 3. Add 15 milliliters of water, stir and raise the temperature $62 ^ { \circ } \mathrm { F }$ . What is the resulting temperature of the mixture after Step 3? ________ ${}^∘ \mathrm { F }$

Multiply. $2 \cdot 8$

Which of the following numbers is farther from 2 on the number line?

Evaluate the expression. $3.8 + | 6.3 + ( - 4.2 ) |$

Subtract. $0 - 3$

Find the product. $10 ( - 5 )$

Evaluate the expression. $\frac { 6 \cdot 7 - 10 ( 4 \cdot 9 - 35 ) } { 4 ( 3 + 2 ) - 3 ^ { 2 } + 5 }$

Multiply. $25 \cdot 53 \cdot 3$

Find the value of the expression. $- | - 35 |$

What number must be added to $- 21$ to obtain $0$ ?

Round each number to the nearest hundred to estimate the value of the following expression: $- 2,344 + 8,692 + 1,055 + ( - 3,454 )$

Estimate the value of  $207 + ( - 147 ) + 548 + ( - 792 )$  by rounding each number to the nearest hundred.

Divide:

The set of __________ numbers is {1, 2, 3, 4, ... }.

Use a calculator to find the power $( - 28 ) ^ { 3 }$ .