Number Sense Unit Review

Evelyn, Arjun, and Daniel are on a number line adventure! They discovered a magical number that always stays the same distance from zero, no matter which direction they go. Can you guess what this magical number is called?

• It's called the Absolute Value!

• It's a Positive Number!

• It's a number with a different sign!

Answer explanation

Absolute value is the distance a number is from zero, making it the correct choice.

Tags

CCSS.6.NS.C.7C

Evaluate: |−12|

• 12

• -12

• 0

• 1.2

Answer explanation

The absolute value of -12 is 12 because the absolute value of a negative number is its positive counterpart. Therefore, the correct answer is 12.

Tags

CCSS.6.NS.C.7C

Simplify: 6/12

• 2

• 1/2

• 2/6

• 6/6

Answer explanation

To simplify 6/12, divide both the numerator and denominator by their greatest common divisor, which is 6. The simplified form is 1/2. Therefore, the correct choice is 1/2.

• A

• B

• C

• D

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

• A

• B

• C

• D

Tags

CCSS.6.NS.C.6C

Write the equivalent expression:

5 + (-2)

• 5 - 2

• 5 + 2

• 5 - (-2)

• 2 + -5

Answer explanation

The equivalent expression for 5 + (-2) is 5 - 2. This is because adding a negative number is the same as subtracting the positive value of that number.

Tags

CCSS.7.NS.A.1B

Write the equivalent expression:

-9-(-4)

• -9-4

• 4--9

• -9+4

• Please send help

Answer explanation

The equivalent expression of -9-(-4) is -9+4 because subtracting a negative number is the same as adding its positive counterpart.

Tags

CCSS.7.NS.A.1D

The temperature was 98 degrees last Friday. Wednesday it was 24 degrees cooler. Which expression represents the relationship in the temperature between Friday and Wednesday?

• (-98) + (-24)

• -98 + -24

• 98 + 24

• 98 + (-24)

Answer explanation

The temperature on Friday was 98 degrees. Wednesday it was 24 degrees cooler. The expression that represents this relationship is 98 + (-24), which gives the correct answer.

Tags

CCSS.7.NS.A.1C

A shark is swimming 45 feet below the surface of the ocean. A fish is swimming 13 feet below the shark. How far below the surface of the water is the fish?

• -58 feet

• 58 feet

• 32 feet

• -32 feet

Answer explanation

The fish is swimming 13 feet below the shark, which is already 45 feet below the surface. Therefore, the fish is 58 feet below the surface of the water. The correct choice is 58 feet.

Tags

CCSS.7.NS.A.1C

Grace and Daniel decided to play a number game. Grace picked the number 20 and Daniel picked -20. What would be the result if they added their numbers together?

• -40

• 20

• 0

• -20

Answer explanation

Adding 20 to -20 results in 0. The sum of a positive and negative number with the same absolute value is always 0.

Tags

CCSS.7.NS.A.1C