Subtracting and Adding

Which of the answers show the subtraction problem correctly rewritten as an addition problem?
−8 − 5

• 8 + 5

• 8 + (−5)

• −8 + 5

• −8 + (−5)

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

• Keep first number the same
  Keep 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

-2 - (-10) = ?

• -12

• 12

• 8

• -8

5 - 8 =

• 13

• 3

• -3

• -13

3 + -7

• 10

• 4

• -10

• -4

6 - 9 = ?

• -3

• 3

• 15

• -13

232- (-84)

• 316

• 148

• -148

• 315

Emily is a diver. Today she descended to a depth of 40 feet below sea level. Then she swam up 10 feet and descended another 4 feet. How far below sea level is Emily now?

• -34 feet

• -54 feet

• 54 feet

• -26 feet

Which problem does not have a sum of (-4)?

• (-9) + (-5)

• 3 + (-7)

• (-9) + 5 

• (-3) + (-1)

(-2)-(-3)

• -1

• -5

• 5

• 1