Math Multiplying and Dividing Rational Numbers

A positive number times a positive number

• equals a negative number.

• equals a positive number.

• can be either positive or negative.

Tags

CCSS.3.OA.D.9

A positive number divided by a positive number

• equals a negative number;

• equals a positive number.

• can be either positive or negative.

Tags

CCSS.3.OA.D.9

To multiply fractions you multiply

• top times top and bottom times bottom.

• you cross multiply.

• you keep it, change it, flip it.

Tags

CCSS.5.NF.B.6

To divide fractions you

• divided top by top and bottom by bottom.

• cross divide.

• keep it, change it, flip it.

Tags

CCSS.6.NS.A.1

A negative number times a positive number

• equals a negative number.

• equals a positive number.

• can be either negative or positive.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

To convert a fraction to a decimal, you

• divide the numerator by the denominator.

• multiply the numerator by the denominator.

• subtract the numerator from the denominator.

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

To convert a decimal to a fraction you

• put the decimal over 100 and reduce as needed.

• divide the decimal by 100 and reduce as needed.

• keep it, change it, flip it.

 $4\ \times\ \left(-8\right)\ =$  

•  $-4$  

•  $32$  

•  $-32$  

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

 $3\ \times\ 4\ =$  

•  $-12$  

•  $12$  

•  $1$  

Tags

CCSS.7.NS.A.2A

 $-5\ \times\left(-5\right)=$  

•  $-10$  

•  $10$  

•  $25$  

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B