Placing Integers on Number Lines

LT: I will solve integer real-world problems.

Brad has 8 points during a trivia game. He answers a question incorrectly and −12 points are added to his score.
First, you must do?

• mark -12 on the number line

• mark 8 on the number line

• mark -8 on the number line

• mark 12 on the number line

_{LT: I will solve integer real-world problems.}

Brad has 8 points during a trivia game. He answers a question incorrectly and −12 points are added to his score.

Next, you need to?

• add -12 by moving left on the number line

• subtract -12 by moving right on the number line

• add 12 by moving right on the number line

• subtract 12 by moving left on the number line

Answer explanation

_{LT: I will solve integer real-world problems.}

Brad has 8 points during a trivia game. He answers a question incorrectly and −12 points are added to his score.

What is the answer?

• 20

• 4

• -4

• -20

Answer explanation

^{LT: I will solve integer real-world problems.}

Brad has 8 points during a trivia game. He answers a question incorrectly and −12 points are added to his score.

What is the correct equation to solve this problem?

• -12 + 8 =

• -8 + (-12) =

• 8 - 12 =

• 8 + (-12)=

^{LT: I will solve integer real-world problems.}

A dolphin is swimming 3 feet below sea level. It dives down 9 feet to catch some fish. Then the dolphin swims 4 feet up toward the surface with its catch.

What number would you mark first on the number line?

• +3

• -3

• -9

• +4

Answer explanation

_{LT: I will solve integer real-world problems.}

A dolphin is swimming 3 feet below sea level. It dives down 9 feet to catch some fish. Then the dolphin swims 4ft. up toward the surface with its catch.

What would be the next number you would move to on the number line?

• add -9

• subtract -9

• add 9

• subtract 9

Answer explanation

^{LT: I will solve integer real-world problems.}

A dolphin is swimming 3 feet below sea level. It dives down 9 feet to catch some fish. Then the dolphin swims 4 feet up toward the surface with its catch.

What is the final move on the number line?

• add 4

• add -4

• subtract 4

• subtract -4

^{LT: I will solve integer real-world problems.}

A dolphin is swimming 3 feet below sea level. It dives down 9 feet to catch some fish. Then the dolphin swims 4 feet up toward the surface with its catch.

What is the dolphin’s final elevation relative to sea level?

Select the correct equation and answer.

• 3 + 9 + (-4)=8

• -3 + (-9) + (+4)= -8

• (-9) + (-3) + 4= 9

• -3 + (-9) +(-4)= -16

Answer explanation

^{LT: I will solve integer real-world problems}.

Dario was scuba diving at an elevation of −20 feet and then descended 20 feet more. What is his elevation now?

• 20 - (-20) = 0

• -20 + 20= 0

• -20 + (-20)= -40

• 20 + 20 = 40

^{LT: I will solve integer real-world problems.}

Latisha has $40 in her checking account. She makes a withdrawal of $20 and then writes a check for $40. Then she deposits $30. What is in her checking account now?

• 40 + (-20) + (-40) + 30= +10

• 40 -(-20) -(+40) -30= -10

• 40 - 20 - 40 - 30= -10

Answer explanation