11.10 subtracting integers

-5 - (-17) ... Which addition sentence represents the same problem?

• -5 + 17

• -5 + (-17)

• 5 + (-17)

• 5 + 17

What is the rules for subtracting integers?

• Change to multiplication and use the opposite of the second number.
• Change to addition and use the opposite of the second number.
• Find the opposite of both numbers and then add. 
• Subtract like normal and keep the larger sign. 

-38 + 16

1) Signs: ​ (a)  

2) What to Do?: ​ (b)   ​

3) Positive or Negative Result? ​ ​ (c)  

4) Final Answer?: ​ (d)  

• Signs are Different
• Subtract the Numbers
• Negative
• -22
• 54
• 22
• Positive
• -54
• Signs are the Same
• Add the Numbers

8 - 14 ... Which addition sentence represents the same problem?

• 8 + (-14)

• 8 + 14

• -8 + 14

• -8 + (-14)

15 - (-15)

-35 - (-10)

• -25

• 25

• 45

• -45