Adding and Subtracting Rational Numbers Using a Number Line

Caleb rode his bike for 3 1/2 miles in the morning. Then he rode his bike for another 2 1/2 miles in the afternoon. How many miles did Caleb ride all together?

• 1 mile

• 6 miles

• 5 miles

• 4 miles

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

Jasmine evaluated the expression 10−(−3) and says it is equal to 7. Is she right? If not, what was her mistake?

• No, she added 3 instead of −3.

• Yes, she is correct. 10 − (−3) = 10 − 3 = 7.

• No, she did not change the sign of 10 when subtracting.

• No, she subtracted 3 instead of −3.

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

If the temperature was 0 degrees and then there was a temperature change of +5 degrees, what temperature change would return the temperature to 0 degrees?

• -5 degrees

• -10 degrees

• 0 degrees

• 5 degrees

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

CCSS.7.EE.B.3

Which set of operations corresponds to the arrows shown on the number line?

• −15+(+20)−(−10)

• −15−(+20)+(−10)

• −15−(−20)+(−10)

• −15−(+20)−(+10)

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

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

• -4

• -20

• 4

• 20

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

CCSS.7.EE.B.3

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?

• -2 feet

• 8 feet

• -8 feet

• 2 feet

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

CCSS.7.EE.B.3

Dario was scuba diving at an elevation of −20 feet and then descended 20 feet more. After the descent, what was his elevation in relation to another diver at an elevation of −30 feet?

• 10 feet

• -40 feet

• -10 feet

• -70 feet

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 her final balance?

• $10

• -$50

• $50

• -$20

Elena wants to use a number line to find the difference 5−(−7). Which is the best description of how she should do this?

• Start at −7 and move 5 units right.

• Start at 5 and move 7 units left.

• Start at −7 and move 5 units left.

• Start at 5 and move 7 units right.

Tags

CCSS.7.NS.A.1

Which sum or difference can you evaluate using the number-line model shown?

• -3 - 2

• -1 + 3

• -1 - (-3)

• -3 - (-2)

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3