Multiplying Decimals Standard Algorithm

What is the standard algorithm for multiplying decimals?

• 1. Remove the decimals

  2.Multiply

  3.Add partial products.

  4. Count the decimals place

  5.Adjust decimal

• 1. Multiply

  2. remove decimals

  3. Count decimal place

• 1. Adjust Decimal

  2.Multiply

  3. Add partial products

  4.Count the decimal place

  5. remove decimal

• none .

Find the value of 2.3 x 2.4

• 5.56

• 2.1

• 5.52

• 3.1

What is the product of 98.6 x 1.6?

• 180

• 157.76

• 157.760

• 142.40

Find the value of 7.25x1.2

• 5.600

• 8.600

• 8.700

• 8.7

The price of a gallon of gasoline is shown. How much does it cost to fill an empty 12.5-gallon gas tank?

The operation I will use to find the total cost to fill an empty tank is ​ (a)   .

The total cost to fill up the tank is ​ (b)   .

• addition

• multiplication

• $29.86

• $10.99

• $25.48

• $26.76

When multiplying decimals, do you have to line up your decimals?

• yes, if you use the standard algorithm

• no, it is not necessary if you are using the standard algorithm

How many digits will be behind the decimal point in the product?
0.15 x 0.624

• 2

• 3

• 4

• 5

Which equation matches the model presented in this hundredths grid?

• 0.4 x 0.3 = 0.12

• 12 x 0.3 = 3.6

• 3 x 4 = 12

• 3 x .12 = 0.36

Multiply Decimals

*1 decimal place.

*10th place.

3 x 0.2 =

• 6

• 0.6

• 0.06

• 0.006

Multiply Decimals

*2 decimal places

*100th place

3 x 0.02 =

• 6

• 0.6

• 0.06

• 0.006