Adding and Subtracting Negatives

Bob lost 5 points on page one of his math test and he lost 9 points on page two of his math test.  Which equation best describes Bob progress on his math test?

• 5 + 9 = 14

• -5 + -9 = -4

• -5 + -9 = -14

• 5 + -9 = -4

What equation is modeled?

• 15 + 25 = -10

• 15 + -25 = -10

• -10 + 15 = -10

• -25 + 15 = -10

What equation is modeled?

• 7 + -6 = -6

• 7 + -13 = -6

• 7 + -14 = -6

• -6 + -14 = -6

What needs to be added to get to the circled answer

• 10

• -10

• -17

• 17

Which of the answers show the subtraction problem correctly rewritten as an addition problem?
7 − 12

• 7 + 12

• 7 + (−12)

• −7 + 12

• −7 + (−12)

Which are the correct steps for rewriting a subtraction problem into addition?

• Keep first number the same
  Change Subtraction sign
  Change second number to opposite

• Keep first number the same
  Change Subtraction into Addition
  Change second number to opposite

• Change the first number into the opposite
  Change Subtraction to Addition
  Keep second number the same

• Change the first number into the opposite
  Change Subtraction to Addition
  Change second number to opposite

-14 + (-3)

• -17

• 11

• -11

• 17

-9 + (-5)

• -14

• 14

• -4

-2 - (-10) = ?

• -12

• 12

• 8

• -8

What is the expression for the number line?

• 6 + (-3)

• (-3) + 6

• 6 + (-9)