Multiplication of Decimals

Myrna saves ​P12.75 a day from her allowances. How much does she save in four weeks. If she receives allowance from Monday to Saturday?

Day 1

Multiplication of Decimals

by Venus Daydayan

Multiplying Decimals

How do you multiply decimals?

READ PLEASE.

Multiple Choice

The first step to multiplying decimals is to multiply the numbers as though they were whole numbers.

• True

• False

Multiple Choice

How many decimal places should be in the product?

• 1

• 2

• 3

• 4

Multiple Choice

The number of decimal places in the answer is the same as the total number of digits to the right of the decimal point in each of the factors.

• True

• False

​page 88

Multiple Choice

When multiplying decimals you must line up the decimals before multiplying.

• True

• False

Multiple Choice

Find the product of 6.35 x 0.87 x 1.5

• 55.245

• 828675

• 8.28675

• 0.828675

When Multiplying Decimals You.....

• Place the decimal with the most digits (number) on top

• You don't have to line up your decimals but you want to set your problem up as if you are multiplying whole numbers using long multiplication.

​Let's Wrap Up...

Day 2​

Multiplying Decimals

​Let's take a review first...

Multiple Choice

5.9 x 6.2

• 36.58

• 3.658

• 0.3658

• 365.8

Multiple Choice

2 320 X 0.004

• 92.8

• 9.28

• 0.928

Multiple Choice

0.001  X  29 010

• 2901

• 290.1

• 29.01

• 2.901

Ready for a few word problems?

When working with word problems, remember there are a few words to help you understand when you need to multiply to solve the problem:

• product

• times

• of

• AND MANY MORE

Example: Caley works 7.5 hours a day, 5 days a week. How many hours will she work in a week?

Caley will work 7.5 x 5 hours per week

7.5

x 5

----

37.5

----

We need to insert the decimal into the answer so that there is one number after the decimal...

Therefore Caley works 37.5 hours per week

Multiple Choice

Each batch of cookie mix need 0.4 cups of sugar, and each batch can make 16 cookies. If Ashley is making 4 batches of cookies, how much sugar does she need?

• 16.4

• 1.6

• 6.4

• 64

Fill in the Blanks

Tim has 7 pieces of wood for a project. If each piece of wood needs to be 4.75 feet long, how many feet of wood does he need for the project?

Multiple Choice

Mrs. Paz bought 3 kilograms of potatoes for salad. Each kilogram cost P20.30. How much did she pay in all?

• P69.90

• P60.90

• P609.00

Poll

How do you feel about multiplying decimals?

• Great!!!

• Kind of great.

• Not so great...

• I don't know what I am doing...

​You may use the next slide for further understanding.

Click the "Open NEw Tab" found below your screen and save it in your bookmark as a reference.

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Well done :)

You are done for today! Please make sure you've completed the asynchronous activity/activities which were assigned on previous days...

See Google Classroom...