Unit 5 Math Review

IM 7th Unit 5 Review

Rational Numbers

Open Ended

What are rational numbers?

Multiple Choice

A negative plus a positive is a negative...

• Always

• Sometimes

• Never

Multiple Choice

A positive minus a positive is a negative...

• Always

• Sometimes

• Never

Multiple Choice

A positive minus a negative is a negative...

• Always

• Sometimes

• Never

Multiple Choice

A positive times a negative is a negative...

• Always

• Sometimes

• Never

Multiple Choice

A negative divided by a negative is a positive...

• Always

• Sometimes

• Never

Multiple Choice

A negative divided by a positive is a positive...

• Always

• Sometimes

• Never

Multiple Choice

A negative times a negative is a negative...

• Always

• Sometimes

• Never

A fish starts swimming at -50 m and increases 13m. Which equation best represents the situation and the fish’s final elevation? Be prepared to explain your reasoning.

a. -50 + 13 = -63

b. -50 + (-13)= -63

c. -50 + 13= -37

d. -50 – 13 = -37

Multiple Choice

A fish starts swimming at -50 m and increases 13m. Which equation best represents the situation and the fish’s final elevation? Be prepared to explain your reasoning.

• -50 + 13 = -63

• -50 + (-13)= -63

• -50 + 13= -37

• -50 – 13 = -37

Yesterday the temperature at noon was 11.4°F. By midnight, the temperature had decreased by 15.7°.

Open Ended

Yesterday the temperature at noon was 11.4°F. By midnight, the temperature had decreased by 15.7°. Write an expression to represent the situation.

Fill in the Blank

Yesterday the temperature at noon was 11.4°F. By midnight, the temperature had decreased by 15.7°. What is the temperature at midnight (in degrees Fahrenheit)?

A company’s stock begins the week with a price of $43.85 per share. The price increases by $2.70 each day for 2 days. Then the price decreases by $1.10 each day for 2 days. On the last day, the price decreases by $4.45. What is the price per share of the company’s stock after those five days?

Multiple Choice

A company’s stock begins the week with a price of $43.85 per share. The price increases by $2.70 each day for 2 days. Then the price decreases by $1.10 each day for 2 days. On the last day, the price decreases by $4.45. What is the price per share of the company’s stock after those five days?

• $41.00

• $42.60

• $45.10

• $55.90

Solve the expression when a= 9 and b= -3.

•  $-3b$  
  

•  $\frac{a}{b}+a$  

Fill in the Blank

Solve the expression when a= 9 and b= -3.

$$-3b$$  

Fill in the Blank

Solve the expression when a= 9 and b= -3.

$$\frac{a}{b}+a$$

Which expressions have the same solution as

 $-3\ \cdot\ \frac{4}{-5}$  

Multiple Select

Which expressions have the same solution as

$$-3\ \cdot\ \frac{4}{-5}$$  

• $$\frac{-3}{-5}\cdot\ 4$$  

• $$-\frac{3}{5}\cdot\ 4$$  

• $$\frac{-3\cdot4}{-3\cdot\left(-5\right)}$$  

• $$-3\cdot4\cdot\frac{-1}{5}$$  

• $$\frac{3}{5}\cdot4$$  

On a winter morning, the temperature before sunrise was -11°F. The temperature then rose by 1/2 degree each hour for 7 hours before dropping by 2 1/4 degree each hour for 3 hours. What was the temperature, in degree Fahrenheit after 10 hours?

Multiple Choice

On a winter morning, the temperature before sunrise was -11°F. The temperature then rose by 1/2 degree each hour for 7 hours before dropping by 2 1/4 degree each hour for 3 hours. What was the temperature, in degree Fahrenheit after 10 hours?

• $$-1\ \frac{1}{4}$$

• $$-10\ \frac{1}{4}$$

• $$-14\ \frac{1}{4}$$

• $$-21\ \frac{1}{4}$$

A hiker begins at sea level and descends 20 feet every minute. How long will it take to get to an elevation of -700 feet?

Open Ended

A hiker begins at sea level and descends 20 feet every minute. How long will it take to get to an elevation of -700 feet? Write an equation to represent the situation.

Fill in the Blank

A hiker begins at sea level and descends 20 feet every minute. How long will it take to get to an elevation of -700 feet?