1

Decimals

Place value,Comparing & Ordering

2

Place Value ChartO

nes

Ten

ths

Hun

dred

ths

Tho

usan

dths

3

DECIMAL PLACE VALUE

Decimals show part of a whole.The decimal point separates the ones place and the tenths place.

The decimal says the word “and”.

4

Decimal Models

One Whole

5

Decimal Models

Tenths

6

Decimal Models

Tenths

0.1

10

1

7

Decimal Models

Hundredths

8

Decimal Models

Hundredths

.01

100

1

9

Decimal Models

.42

forty two hundredths

100

42

10

Decimal Models

3.7

10

73

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Comparing Decimals

Number line

5.1 5.8

5.0 6.05.5

5.1 5.8<

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Comparing Decimals

Place Value

2.037 2.0332.037

2.033

Line up decimal points

Start at left, compare each

place value

13

Comparing Decimals

Place Value

2.037 2.033

2.037

2.033

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Comparing Decimals

Place Value

2.037 2.033

2.037

2.033

7 and 3 are not equal

7 thousandths > 3 thousandths

>

15

Ordering Decimals

Place Value

19.48, 19.481, 19.4

19.48

19.481

19.4

Line up the decimal points

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Ordering Decimals

Place Value

19.48, 19.481, 19.4

19.48

19.481

19.4

Annex a zero so that each has the same number of decimal places.

0

00

17

Ordering Decimals

Place Value19.48, 19.481, 19.4

19.48

19.481

19.4

0

00

Compare place to place, putting the numbers in order from least to greatest.

19.48; 19.48119.4;

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Ordering Decimals

Place Value19.48, 19.481, 19.4

19.48

19.481

19.4

0

00

19.4; 19.48; 19.481