Multiplying and Dividing Decimals

Multiplying and Dividing Decimals

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Multiplying Decimals

• The number with the most digits goes on top

• Decimals do NOT have to line up

• Multiply like normal

• Count how many numbers are behind the decimals

• This number is how many numbers need to go behind the decimal in the product

Multiple Choice

12.5 x 3.4=

How many numbers will come after the decimal in the answer?

• 1

• 2

• 3

• 4

Multiple Choice

2.5 x 3.1=

• 77.5

• 775

• 7.75

• .775

Dividing Decimals

• Divisors cannot have a decimal

• Move the Divisor decimal so it is a whole number

• Move the same amount of places in the dividend

• Decimal goes straight up

• Divide like normal

Multiple Choice

$$6.85\div\ .5$$   How many places will you have to move the decimal?

• 1

• 2

Multiple Choice

$$6.85\div\ .5=$$  

• 13.7

• 1.37

• .137

Multiple Choice

3.3 ÷ 0.3

• .99

• 1.1

• 11

• 9.9

Multiple Choice

36.8 ÷ 2

• 18.4

• 184

• 18.04

• 1.84