Join Karin Hutchinson for an indepth discussion in this video Solution: Multiply and divide integers, part of Foundations of Algebra: PreAlgebra.
(cymbal swell)… For this solution set, I'm going to give you the answers…to all of the problems so that you can check your solutions.…Please keep watching as I will go through each problem…individually just in case you got…any of the answers incorrect.…Now we're gonna work through these problems together.…Letter A…is 12 times 12.…In this problem, we are multiplying two numbers…that have different signs.…
That means that my answer is going to be negative.…12 times 12 is 144,…therefore the product is 144.…For letter B,…we have 200 divided by 10.…These two numbers have the same sign.…Since we are dividing, we are going to divide the numbers…and make the answer positive,…so 200 divided by 10 is 20.…
Therefore, 200 divided by 10…is equal to 20.…For letter C,…we have 3 times 5 times 2.…For this problem, I'm going to first…multiply 3 times 5.…These two numbers have different signs,…therefore the answer is 15.…Now we're gonna multiply 15 times positive 2.…Again, these two numbers have different signs.…
Therefore, the answer's going to be negative.…
Author
Karin HutchinsonReleased
8/4/2015This course includes practice challenges and worksheets, as well as tips for educators who are helping students master prealgebra for Common Core. Karin Hutchinson also helps you evaluate, write, and simplify expressions, and solve word problems and complex algebraic expressions.
 Adding integers
 Subtracting
 Multiplying and dividing
 Understanding the order of operations
 Evaluating expressions
 Breaking down word problems and algebraic expressions
 Distributing positive and negative numbers
 Simplifying expressions
Skill Level Appropriate for all
Duration
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Introduction

Welcome1m 7s


1. Adding Integers

Introduction to integers4m 1s

Absolute value2m 50s

Solution: Add integers4m 19s


2. Subtracting Integers

Solution: Subtract integers4m 10s

3. Multiplying and Dividing Integers

4. Order of Operations

5. Evaluating Expressions

6. Word Problems and Algebraic Expressions

More realworld problems4m 35s

7. The Distributive Property

8. Simplifying Expressions

Introduction to like terms3m 13s

Combining like terms6m 6s


Conclusion

Next steps40s

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Video: Solution: Multiply and divide integers