Unit 1 Test

Which expression is correct for the counters?  (Red is negative and Yellow is positive.)

• -4 + 7

• 4 + 7

• 4 + -7

• 4 - (-7)

Which expression is correct for the number line?

• 4 - (-6)

• 4 + (-2)

• 4 + 6

• 4 + (-6)

• -3

• 3 

• 0 

The elevation in Dayton, Ohio is 738 feet above sea level. Which integer best describes the elevation?

• 738

• -738

What is the absolute value of the number on the number line?

• -3

• 3

• none of these

An cave explorer descends 10 feet into a cave, then climbs up 15 feet. Which equation shows his final position?

• 10 + -15 = -5 feet

• -10 + 15 = 5 feet

• 10 + 15 = 25 feet

• -10 + -15 = -25 feet