Addition and Subtraction Up to 40

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

5 - (-12)

• -7

• 7

• 17

• -17

Step 1: Add your numbers
Step 2: Keep your signs
These steps apply to which rule?

• Adding Integers Rule (for same signs)

• Subtracting Integers Rule (for same signs)

• Multiplying Integers Rule (for same signs)

• Dividing Integers Rule (for same signs)

Keep the sign of your first number. Change the subtraction sign to addition. Change the sign of your second number to its opposite/additive inverse. Then apply the rules for addition with same signs OR different signs.

• Adding Integers Rule 

• Subtracting Integers Rule 

• Multiplying Integers Rule 

• Dividing Integers Rule 

−2 + 8 =

• 6

• −6

• −10

• 10

Which of the following expressions has the greatest value?

• -7+(-3)

• 11-(-5)

• -9+5

• 12-6

Rewrite the following subtraction problem as addition:   -1 - 7

• -1 + 7

• 1 + 7

• -1 + (-7)

• 1 + (-7)

16 + (-13) + 5

• 34

• 8

• 11

• 3

Which question is the SAME as
24 + (-6)             ?

• 24 - 6

• 24 + 6

• -24 - 6

• -24 + 6

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

• 7 + 12

• 7 + (−12)

• −7 + 12

• −7 + (−12)