Unit 4 - Multiplying and Dividing

Summary of Knowledge:

In unit 4, Accentuate the Negative we learned how to work with positive and negative numbers. Although negative numbers are not very common in daily life experiences, they are very important information. As well, we learned how to work with exponents when adding, subtracting, multiplying, and dividing. We noticed certain rules to solve the problems in this unit.

Key Vocabulary

Commutative Property: The order of the addition or multiplication of two numbers that does not change the results or its product.

Examples:

2 + 3 = 5 / 3 + 2 = 5 / 4 x 2 = 8 / 2 x 4 = 8

Absolute Value: The absolute value of a number is its distance from zero on a number line.

Examples:

/-3/ 3

Task Analisis: for multiplying and dividing negative numbers.

1. 
   
   
   
   
   
   First multiply/divide the numbers like if there were not negative or positive signs(do a normal division/multiplication).






2. 
   
   
   
   
   
   
   If there is an even number of negative signs, then the product will be positive, but if there is an odd number of negative signs, then the product will be negative.

Examples:


Multiplication : -2 x 6 = -12 , -12 x -3 = 36

Division: -144 /12 = -12 , -56 / -8 = 7

Here are some fact families

12 x 3 = -36 2/100 /

3 x -12 = -36

-36 / -12 = 3

-36 / 3 = -12

Next you will show your abilities and skills in this quiz that we have prepared for you...

GOOD LUCK ! ! !

Multiplying and Dividing Negative Numbers. » test maker