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Published byGertrude Mason Modified over 8 years ago
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COMPARING AND ORDERING DECIMALS Math Unit 1
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OBJECTIVE B.E.L., We will compare and order decimals to the thousandths place.
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APK – WHAT DO WE ALREADY KNOW? Decimals show part of a whole. The decimal point separates the ones place and the tenths place. The decimal says the word “and”. The value of a digit is affected by its place in the number
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APK – CONTINUED… As we move left, each position is 10 times bigger! Example: Hundreds are 10 times bigger than Tens... and... As we move right, each position is 10 times smaller
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COMPARING DECIMALS To record the comparisons, we use > is greater than < is less than = is equal to
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COMPARING DECIMALS 1. Line up the decimal points. 2. Start at the left 3. Compare each place value 1.2.037 2.033 2. The 7 in the thousandths place is > than the 3 in the thousandths place. So, 2.037 > 2.033 2.0372.033 >
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WE DO Look at Example A: We will compare 17.31 and 17.52 Look at Example B: We will compare 14.81 and 13.88 *Using the place value chart helps us to see the place at which these two numbers differ.
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Let’s go shopping! Remember to be frugal! We are on a budget!
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Which would you choose? $1.2 $1.02
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Which would you choose? $39.15 $39.51
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Which would you choose? $3.1 $3.19
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Which would you choose? $2.31 $3.01$2.13
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Great job!
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14 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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15 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
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16 Ordering Decimals Place Value 19.48, 19.481, 19.4 19.48 19.481 19.4 0 00 19.4; 19.48; 19.481
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