Objective To Read Write and Round Decimals Writing Decimals in Words Place Value Chart Millions Hundred Thousands Ten Thousands Thousands Hundreds Tens Ones Tenths Hundredths Thousandths ID: 342795
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Slide1
1-5 Understanding Decimals
Objective: To Read, Write and Round DecimalsSlide2
Writing Decimals in Words
Place Value Chart
Millions
Hundred Thousands
Ten Thousands
Thousands
Hundreds
Tens
Ones
.
Tenths
Hundredths
Thousandths
Ten Thousandths
Hundred
Thousandths
MillionthsSlide3
Writing Decimals in Words
Place Value Chart
3
2
4
.
5
68MillionsHundred ThousandsTen ThousandsThousandsHundredsTensOnes.TenthsHundredthsThousandthsTen ThousandthsHundred ThousandthsMillionths
Three hundred twenty-four AND five hundred sixty-eight thousandthsSlide4
Writing Decimals in Words
Place Value Chart
4
5
6
3
9
72.134MillionsHundred ThousandsTen ThousandsThousandsHundredsTensOnes.TenthsHundredthsThousandthsTen ThousandthsHundred ThousandthsMillionths
Four million, five hundred sixty-three thousand, nine
h
undred seventy-two and one hundred thirty-four thousandthsSlide5
Standard Form and Expanded Form
In the 2012 Olympics in London, Gabby Douglas won the gold in the women’s all-around gymnastics final. Her total score was sixty-two and two hundred thirty-two thousandths.
Write the score in standard form
62.232Slide6
Expanded Form
Expanded Form shows the place and value of each digit of a number
Example: Expanded form of 3.75
3 + 0.7 + 0.05
Write
Gabby’s
score in expanded form 62.232
60 + 2 + 0.2 + 0.03 + 0.002Slide7
Additional Practice
The Silver Medalist,
Victoria
Komova, scored sixty-two and four hundred ninety-one thousandths.
Write her score in both standard and expanded formSlide8
Additional Practice
The Silver Medalist,
Victoria
Komova, scored sixty-two and four hundred ninety-one thousandths.
Write her score in both standard and expanded form
62.491
60 + 2 + 0.4 + 0.09 + 0.001Slide9
Rounding Decimals
The rules for rounding decimals are the same as for rounding whole numbers
Round 2.1582 to Hundredths Place
Slide10
Rounding Decimals
The rules for rounding decimals are the same as for rounding whole number
Round 2.1
5
82 to Hundredths Place
Find the place you are rounding to
Slide11
Rounding Decimals
The rules for rounding decimals are the same as for rounding whole number
Round 2.1
5
82 to Hundredths Place
Looks to the right, is that number 5 or larger?
Slide12
Rounding Decimals
The rules for rounding decimals are the same as for rounding whole number
Round 2.1
6
to Hundredths Place
The 5 changes to a 6 and everything after it drops off. Slide13
Practice
Round 2.3428 to the tenths place
Round 0.1785 to the hundredths place
Round 9.053 to the tenths placeSlide14
Practice
Round 2.3428 to the tenths
place: 2.3
Round 0.1785 to the hundredths
place 0.18
Round 9.053 to the tenths
place 9.1Slide15
Homework
Page 24:
12-20 even, 21-33 all