Chapter 3: Decimals

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Chapter 3 Decimals

• Reading, Writing, Rounding, and Ranking

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Reading Decimals
Place value
and is only used to mean a decimal point
and ths
?
14.23
Fourteen and twenty-three hundredths
14.023
Fourteen and twenty-three thousandths
14.0023
Fourteen and twenty-three ten-thousandths
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Reading Decimals
Decimal Fractions end in ths
Whole Numbers
Fifty-two and one thousand eight hundred
sixty-seven ten-thousandths
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Rounding Decimals
Round 14.8647 to the nearest hundredth.
Mark the place value being considered
Round up
14.8647
Look at the number to the right
Since the number is less than 5 the 6 does not
change.
No change
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Rounding Decimals
Round 14.8647 to the nearest tenth.
Mark the place value being considered
Round up
14.8647
Look at the number to the right
Since the number is greater than 5 the 8 changes
to a 9.
No change
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Ranking Decimals
0.302, 0.31, 0.206
1. Start with the tenths place and cover the
rest.
Smallest to Largest
0.302 0.31 0.206
0.3 0.3 0.2
0.30 0.31 0.20
0.302 0.31 0.206
2. List in order of smallest to largest.
0.206, 0.302, 0.31
0.206, 0.302
0.206
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Ranking Decimals
1. Add Zeros
2. Read
0.302 0.31 0.306
0.310
3. List in order of smallest to largest
Three hundred two thousandths Three hundred ten
thousandths Three hundred six thousandths
0.302, 0.306, 0.31