7th Final Study Guide

NO CALCUALTOR: At 6 a.m. the temperature was -8°C. At noon the temperature was 3°C. What was the change of temperature between 6 a.m. and noon?

• 5

• -5

• 11

• -11

Answer explanation

When you find the change you need to find the difference or distance between both numbers.

3 - (-8). Then Keep change change means 3 + 8

Tags

CCSS.7.NS.A.1C

• 6

• -1/6

• 54

• -54

Answer explanation

Dividing fractions is easy as pie. Flip the second number and multiply

Keep change flip

MULTIPLY THE FLIP

Tags

CCSS.7.NS.A.2B

NO CALCULATOR: Write the decimal equivalent of 7/20?

• 7.20

• 0.72

• 0.35

• 2.8

Answer explanation

Divide:

Long division

Bottom number on the outside

At the farmers’ market, you can buy 3 melons for $10.50, 6 melons for $21, or 9 melons for $31.50. What is the constant of proportionality for buying melons? [Notes 4.2]

• 10.50

• 3.50

• 31.50

• 13.50

Answer explanation

Divide each ratio.

If there is the same answer for every division problem, then that is your constant of proportionality (K)

Tags

CCSS.7.RP.A.2B

Four croissants cost $2.60. How much will it cost to purchase 7 croissants? [Notes 4.1]

• $18.20

• $4.55

• $9.60

• $9.10

Answer explanation

Need to divide $2.60 by 4 first to get the cost of 1.

Then you can multiply by 7.

OR

Cross products

Tags

CCSS.6.NS.B.3

The cost of 50 pounds of pet food is $117.50. What is the cost for one pound of pet food?

• $2.35

• $167.50

• $67.50

• $0.43

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

On a map, the distance between two cities is 7.3 centimeters. The map scale is 1 cm : 50 km. What is the actual distance between the two cities? [8.1 notes]

• 182.5

• 6.85

• 365

• 57.3

Answer explanation

A good method to doing this problem is proportions (cross products). That way you know if you should multiply or divide.

Tags

CCSS.6.RP.A.3B

Dallas got a raise. His hourly wage was increased from $9 to $10.25? What was the percent increase in Dallas’s wage to the nearest whole percent? [Notes 5.2]

• 10%

• 12%

• 14%

• 125%

Answer explanation

YES!!!

Remember

New - Old/Old

Tags

CCSS.6.RP.A.3C

What is the surface area of the prism? (remember: surface = sir face) [9.4 notes]

Answer explanation

remember to draw the face. Find the area of each part and add them together

Tags

CCSS.7.G.B.6

What is the volume of the prism? [9.5 notes]

Answer explanation

volume for a rectangular prism is l x w x h

Tags

CCSS.7.G.B.6