Upcoming SlideShare
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Standard text messaging rates apply

# Operations with integers

264

Published on

Published in: Education
0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total Views
264
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
8
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Transcript

• 1. Operations with Integers1/30/13
• 2. What are Integers?• Integers include all of the positive and negative whole numbers, and zero. Integers NOT Integers 3 -1.652 -4 ¾ 12 2.5 0 0.7
• 3. Adding Integers• On a number line:1. Find the first number.2. Move the distance of the second number. a) Positive (+) numbers, move RIGHT b) Negative (-) numbers, move LEFT3. Where you land is the answer!Example: 5 + 8
• 4. Examples:• -4 + 1 =• 7 + -9 =• -8 + -4 =
• 5. Adding Integers Rules• Use if you don’t have a number line.• When the integers are: ▫ Both Positive: add the numbers  Ex: 4 + 6 = ▫ Both Negative: add the numbers and make it negative  Ex: -2 + -5 = ▫ One Positive and One Negative: Subtract and use the sign of the bigger number.  Ex: -7 + 4 =
• 6. You Try!• Add the integers.• 12 + -4 =• -8 + -9 =• 2 + 13 =• -11 + 5 =
• 7. Subtracting Integers 1/31/13• Change the minus to a plus, and change the sign of the number you are subtracting.• Then add!• Ex: -14 – 6 =• Subtracting a Negative is the same as Adding!• Ex: 12 – (-3) =
• 8. You Try!• Subtract the integers.• 17 – 4 =• -8 – (-5) =• 2 – 11 =• -4 – 12 =
• 9. Multiplying Integers 2/1/13• Sign Rules:• Same signs -> Positive answer! + ∙ + = + and – ∙ – = +• Ex: 2 ∙ 3 = 6 and -2 ∙ -3 = 6• Different signs -> Negative answer! + ∙ – = – and – ∙ + = –• Ex: 2 ∙ -3 = -6 and -2 ∙ 3 = -6
• 10. Examples:• (5)(-12) =• -14 x -8 =• -23 ∙ 7 =
• 11. You Try!• -9 x 17 =• (-20)(-16) =• 14 ∙ -5 =
• 12. Dividing Integers• Sign rules are the same as multiplying!• Examples:• -16 ÷ -8 =• =
• 13. You Try!• -90 ÷ 6 =•• -57 ÷ 19 =