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Today we will subtract with decimals. - PowerPoint PPT Presentation


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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 .

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today we will subtract with decimals

Today we will subtract with decimals.

subtract =take away

Decimals=numbers less than zero

slide2

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
  • Subtract means take away from something.

Example: 4-2= 4

or

-

=

decimal
Decimal
  • A decimal is a number less than 1.

For example

  • $0.70
  • 10.50989
  • $25.50
importance
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
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 one1
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 one2
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!

slide9

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

slide10

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

slide11

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
Let’s review!
  • What does subtractmean?

Take away!

  • What is a decimal?

A number less than 1.