Unit 6 Practice Test

What is the value of -14 - |-3|?

Answer explanation

1. 1. Solve for the absolute value (ans: 3)

2. 2. Use your calculator to type -14 - 3

Tags

CCSS.7.NS.A.1C

Jennifer went on an adventure through a park. She dove 64 feet below sea level in the lake. After diving, she hiked up a small hill to an elevation of 24 feet above sea level. Use absolute value to show Jennifer’s total change in elevation.

• |−64| − |24|, by 40 feet

• |−64| − |−24|, by 40 feet

• |−64| + |24|, by 88 feet

• |−64| + |−24|, by 88 feet

Answer explanation

She went 64 feet below the surface and then traveled 24 feet above the surface. Distance is positive, that is why you are seeing the absolute value bars.

She went 64 feet going from her lowest point to sea level (0) and then 24 more feet to reach her highest point.

To find the total, add the two together.

Key Word: Total (add)

What is the value of the expression -7 + (-5)?

Answer explanation

You are adding more debt to debt, so it will bring you deeper in debt!

Please use your calculator to check your answer here!

Tags

CCSS.7.NS.A.1C

What is the value of the expression 3 - 10?

Tags

CCSS.7.NS.A.1C

What is the value of the expression -1/6 + 2/3? Write your answer in fraction form.

Answer explanation

1. 1. Find the common denominator using LCM (ans: 6)

2. 2. Put the negative in the numberator.

3. 3. Add across the numberators

4. 4. Keep the denominators the same.

5. 5. Simplify

Tags

CCSS.7.NS.A.1C

What is the value of 6 and 3/5 - (-3.02)? Write your answer as a decimal.

Answer explanation

1. 1. Change the mixed number to a decimal.

2. 2. Use your calculator.

Don't forget to type in the subtraction symbol AND the negative unless you add instead.

Tags

CCSS.7.NS.A.1C

What is the value of 2/3 + (- 1/4)? Select all that apply.

• 5/12

• 10/24

• 1.416 with a repeating 6

• 0.416 with a repeating 6

• 1/7

Answer explanation

Find the common denominator to creative equivalent fractions before solving.

You can check for equivalency if they have the same decimal value.

Tags

CCSS.7.NS.A.1C

Ally had $22.53 in her account. She wrote a check for $31.55. What will her account balance be when the check is cashed?

• -$54.08

• -$9.02

• $9.02

• $54.08

Answer explanation

Having the money in the account is positive, but you will subtract the amount of the check because it is the same thing as paying for something.

If you pay for something that is more money than you have, you will be in debt (negatives). That is the case here.

Tags

CCSS.7.NS.A.1C

Bob had 72.6% in math class. He did not do well on his last test and his grade changed by -4.1%. He then earned some extra credit and his grade improved by 1.8%. What is his new grade?

• 66.7%

• 68.5%

• 70.3%

• 78.5%

Answer explanation

You will take his score and subtract what it went down by and then add the extra credit to get to the new grade.

Tags

CCSS.7.EE.B.3

It snowed 1/4inch on Saturday and 1 and 1/2 inches on Sunday. On Monday, 0.6 of an inch of snow melted. How much snow was left on the ground on Monday?

• 4/5 inches

• 3/20 inches

• 1 and 3/4 inches

• 1 and 3/20 inches

Answer explanation

Add the amount snowed for Saturday and Sunday. Then, subtract the amount melted. Turn your answer back into a fraction and simplify.

Tags

CCSS.7.NS.A.3