Download presentation

Presentation is loading. Please wait.

Published byLeslie Nash Modified over 8 years ago

1
1.4-5: Multiplying Integers: Basic Rules

2
Ways to Express multiplication Remember: All of these mean the same thing: Five times four 5 × 4 5 · 4 5(4)

3
Multiplying on a Number Line: Positive Integers 5(3)

4
Multiplying on a Number Line: Positive times Negative 5(–3) –5(3)

5
Multiplying on a Number Line: Negative times Negative –5(–3)

6
Rules for Multiplying Integers If the signs of the factors are the same, the product is positive: 3(2) = 6–3(–2) = 6 If the signs of the factors are different, the product is negative: –3(2) = –63(–2) = –6

7
Dividing Integers Remember, division can be written like this: 32 ÷ 16...or like this:

8
Dividing Integers To divide integers, follow the same rules as for multiplying: Negative divided by negative has positive result. Positive divided by negative or negative divided by positive …has negative result.

9
IMPORTANT: Division by Zero Division by zero is undefined (not defined) in our everyday number system. In other words, “3 ÷ 0” has no answer. If you are supposed to evaluate an expression such as –10 ÷ 0 You should write this answer: undefined

10
Try It Yourself 1.3(8) 2.3(–8) 3.–3(–8) 4.–3(8) 5.2(–4) 6.–2(–4) 7.–2(4) 8.–3(0) 9.–10(10) 10.0(–15) 11.–10(–10) 12.–5(–5) 13.–5(5) 14.5(–4)

Similar presentations

© 2024 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google