changing decimals to fractions

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Changing Decimals to Fractions .9 9/1 0

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Place Values .91 .912 .9 Tenths Hundredths Thousandths And so on… You will be using the place value as your denominator when we change the decimals to fractions.

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Page 1: Changing Decimals to Fractions

Changing Decimals to Fractions

.9 9/10

Page 2: Changing Decimals to Fractions

Place Values

.9

Tenths

.91

Hundredths

.912

Thousandths

And so on…

You will be using the place value as your denominator

when we change the decimals to fractions.

Page 3: Changing Decimals to Fractions

Step OneEXAMPLES= .4 .67

Find place value of the decimal, and write this # as

your denominator

Tenths Hundredths

10 100

Page 4: Changing Decimals to Fractions

Step TwoEXAMPLES= .4 .67

1) 10 100

2) 10100

467

Bring the number from the decimal and place it as the numerator for the fraction

Page 5: Changing Decimals to Fractions

Step ThreeREDUCE FRACTION TO LOWEST

TERMS (if possible)4 67

10 1001)

4 ÷ 2 = 2 10 ÷ 2 = 5

*Remember: Whatever you do to the numerator, you must do to the

denominator & vice versa

ALREADY IN LOWEST TERMS

Page 6: Changing Decimals to Fractions

YOUR TURN!!!You have 5 seconds … take out your white board, expo marker,

and felt eraser. Be ready for YOUR problem!0.75 75 ÷ 25 =

100 ÷ 25 =

0.12

34

12 ÷ 4 =100 ÷ 4 =

325

Page 7: Changing Decimals to Fractions

PRACTICE CONTINUED…

0.040

0.325

40 ÷ 20 =1000 ÷ 20 =

325 ÷ 25 =1000 ÷ 25 =

250

1340

TIP: Use DIVISIBILITY RULES when reducing fraction to lowest terms!

Page 8: Changing Decimals to Fractions

PART 2:Changing Fractions to

Decimals

.9 9/10

Page 9: Changing Decimals to Fractions

KEY VOCABULARYTERMINATING

DECIMAL:A decimal that ENDS

EX: 2.14REPEATING DECIMAL:A decimal # that REPEATS a pattern of

digitsEX: 2.141414… = 2.14

*Symbolized with a repeating bar over the repeating digits.

Page 10: Changing Decimals to Fractions

Step OneEXAMPLE= 4

Divide – numerator becomes the dividend

Denominator becomes the divisor TOP goes in the BOX

10

10 4

Page 11: Changing Decimals to Fractions

Step TwoEXAMPLE= 4

After setting up the division problem (TOP goes in the BOX) … ADD a DECIMAL behind the

whole # and at least two zeros

10

10 4.00

Page 12: Changing Decimals to Fractions

Step ThreeEXAMPLE= 4

Bring the decimal UP and mark your place holders

10

10 4.00_. _ _

Page 13: Changing Decimals to Fractions

Step FourEXAMPLE= 4

DIVIDE *Remember you can NEVER have a remainder when working with decimals ~ add more zeros until the # terminates or repeats (If you must round … go the hundredths place)

10

10 4.000.40

Page 14: Changing Decimals to Fractions

YOUR TURN!!!You have 3 seconds … take out your white board, expo marker,

and felt eraser. Be ready for YOUR problem!49

45

9 4.00 0.4 REPEATINGDECIMAL

5 4.000.8 TERMINATINGDECIMAL

Page 15: Changing Decimals to Fractions

If your fraction is not reduced to LOWEST TERMS … SIMPLIFY

before dividing!

1518

6 5.00 0.83 REPEATINGDECIMAL

÷3=÷3=

56

NOTE: