Positive and Negative Decimals Addition and Subtraction

• Line up decimals with the greater absolute value on top.

• Get common denominators.

• Keep - Change - Opposite

• Be rational.

• Addition

• Subtraction

• Multiplication

• Division

When ADDING a (Negative) + (Negative) =

• a POSITIVE answer.

• a NEGATIVE answer because you move further to the left on the number line.

• a million.

• a hundred and one.

In addition if the first number is negative

• Always add

• Always subtract

• Add if both negative

• Subtract if the other number is positive

• Take sign of number with greater absolute value

Kyle has two numbers 2.376 and 0.122.
What is the sum of both the numbers?

​ ​ ​ (a)  

What is the difference of both the numbers?

​ ​ (b)  

• 2.498

• 3.498

• 1.498

• 2.254

• 1.456

• 0.876

• 1.75

-1.3 + 3.6 = ?

• 2.3

• -2.3

• 4.9

• -4.9

-4.2 + 0.7

• -10.1

• -3.5

• -1.7

• -5.1

4.33 - .5

• -3.83

• 4.28

• -1.33

• 3.83

4.16 - 9.043

• -4.883

• 13.203

• 4.883

• -13.203

Chance has two numbers 2.376 and 0.122.
What is the sum of both the numbers?

​ ​ ​ (a)  

What is the difference of both the numbers?

​ ​ (b)  

• 2.498

• 3.498

• 1.498

• 2.254

• 1.456

• 0.876

• 1.75