Today we will subtract with decimals.

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# Today we will subtract with decimals. - PowerPoint PPT Presentation

Today we will subtract with decimals. subtract =take away Decimals=numbers less than zero. If you have \$1.00 and you buy an ice cream for \$0.50 you would have \$0.50 left. You do this in your head all the time when you buy items at the store!. Subtract .

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### Today we will subtract with decimals.

subtract =take away

Decimals=numbers less than zero

If you have \$1.00 and you buy an ice cream for \$0.50 you would have \$0.50 left. You do this in your head all the time when you buy items at the store!

Subtract
• Subtract means take away from something.

Example: 4-2= 4

or

-

=

Decimal
• A decimal is a number less than 1.

For example

• \$0.70
• 10.50989
• \$25.50
Importance
• Why you purchase something in the store, you always need to know if you received the correct change!
• It will help you on any tests that subtracting decimals is on!
• What would be other reasons to know how to add numbers with decimals?
Let’s try one!

3.58+ 7.41=

8.58

- 7.41

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down!

1

1

7

.

Bring decimal straight down!

Let’s try one!

39.67+ 21.46=

39.67

- 21.46

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down!

.

1

2

8

1

Bring decimal straight down!

Let’s try one!

0.681+ 8.513=

1

9.681

-8. 513

7

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down!

.

1

6

8

1

Bring decimal straight down!

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down

Bring decimal straight down

30.333

-23.460

6.873

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down

Bring decimal straight down

22.181

-19.0949

3.0861

To find the difference, rewrite numbers so that the decimal point lines up vertically.

Subtract straight down

Bring decimal straight down

89

-64.8

24.2

Let’s review!
• What does subtractmean?

Take away!

• What is a decimal?

A number less than 1.