Decimal Numbers, Add, Subtract and Compare

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

• Get common denominators.

• Keep - Change - Opposite

• Be rational.

How do you order and compare rational numbers?

• Add them.

• Subtract them.

• Change them to variables.

• Change them to decimals and compare place values.

How do you find distance between numbers?

• Subtract and take the absolute value.

• Multiply.

• Divide

• Make mixed numbers.

Compare the decimals. What symbol should go in the blank?

1.403 _ 1.44 (ON YOUR SCRATCH PAPER, ANNEX A 0 TO THE END OF THE 2ND NUMBER TO MAKE THEM BOTH HAVE THOUSANDTHS, THEN COMPARE THE WHOLE NUMBERS. IF THE WHOLE NUMBERS ARE THE SAME COMPARE THE DECIMAL NUMBERS.)

• <

• >

• =

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

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

-12.4 + 9.2 + 1 

Mathematical Equivalence

ON

Add the decimals. 6.25 + 3.9 + 3.84 =

(On your scratch paper, line up the decimal points, annex 0s in the empty spaces, & add)

• 10.48

• 13.90

• 13.99

Subtract the decimals. 6.04 - 3.48

(On your scratch paper, put the larger number on top, line up the decimal points, & subtract. DON'T FORGET TO BORROW AND REGROUP IF THE SMALLER DIGIT IS ON TOP)

• 3.44

• 2.56

• 2.65

Subtract the decimals. 15 - 6.01 =

(ON YOUR SCRATCH PAPER, PUT A DECIMAL AFTER THE WHOLE NUMBER, PUT THE LARGER NUMBER ON TOP, ANNEX 0'S IN THE EMPTY SPACES, & SUBTRACT. DON'T FORGET TO BORROW AND REGROUP IF THE SMALLER DIGIT IS ON TOP)

• 5.86

• 21.01

• 8.99

• 7.99