Adding, Subtracting, and Multiplying Decimals

REMEMBER!!

ALWAYS line up your decimal points!

Adding & Subtracting Rules

Line Up Your Decimal!!

Multiple Choice

Which is correct?

• Left

• Right

Multiple Choice

Which is correct?

• Left

• Right

Multiple Choice

What is the sum of 1.70+4.65?

• 2.95
• 5.35
• 6.35
• a decimal

Multiple Choice

Find the sum.
2.98 + 5.3 = ____

• 2.51
• 8.28
• 3.63
• 2.37

Multiple Choice

Solve the following addition problem. 5.5+4.3=

• 98

• 54.53

• 9.8

• 9.08

Multiple Choice

Snack Bar Menu:

Water Bottle: $1.00

Soda: $1.50

Candy Bar: $.75

Popcorn: $1.00

Hot Dog: $2.00

How much does it cost to buy a soda and a bag of popcorn?

• $.50

• $2.50

• $250

• $2.25

Multiple Choice

20 - 18.75

• 2.75

• 18.75

• 1.25

• 15.65

Multiple Choice

What is 2.14 - 1.04?

• 1.89

• 1.1

• 3.18

• 0.76

Multiple Choice

What is 4.09 - 2.27?

• 1.82

• 6.36

• 2.40

• 2.02

Multiple Choice

What is 7.89 - 3.45?

• 1.54

• 4.44

• 4.67

• 2.89

If both numbers have a decimal...

Count the number of place values after the decimal for EACH number. When you get to your answer, move the decimal back that many places.

Multiplying Decimals

I am learning to multiply decimals and whole numbers.

Fill in the Blanks

What is 0.09 x 0.3?

Multiple Select

Where does the decimal go in the answer:

.11 x .3 = 33

• 0.033

• 0.33

• 3.3

Multiple Choice

45.1 x 7

• 31.57
• 315.7
• 3,157
• 3.157

Multiple Choice

What is the correct location of the decimal point in the product?

22.2 x 0.44 = 9768

• 0.9768

• 97.68

• 976.8

• 9.768

Multiple Choice

How many decimal places should we have in the product for this multiplication problem: 0.15 x 0.6

• 0

• 1

• 2

• 3

Multiple Choice

How many decimal places should we have in the product for this multiplication problem: 1.5 x 0.6

• 0

• 1

• 2

• 3

Multiple Choice

4 x 0.03

• 12

• 0.12

• 120

• 0.012

Fill in the Blanks

Multiply.

6 × 0.8 = ?

Multiple Choice

Multiply.

7 × 0.9 = ?

• 0.063

• 0.63

• 6.3

Multiple Choice

0.2 x 0.8

• 16
• 0.16
• 0.016
• 1.6