2 1 Equivalent Frac Dec
Transcript of 2 1 Equivalent Frac Dec
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Equivalent Fractions and Decimals
Warm UpWrite each fraction in the simplest form.
1. 2.
3. 4.
1846
2163
10072
13
13
412
923
2518 or 1 7
18
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Equivalent Fractions and Decimals
Essential Question:How are fractions and decimals related?
Standard:
MCC7.NS.2d: Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0s or eventually repeats.
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
Vocabulary
terminating decimalrepeating decimal
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Equivalent Fractions and Decimals
In baseball, a player’s batting average compares the number of hits with the number of times the player has been at bat. The statistics on the next slide are for the 2006 Major League Baseball season.
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Equivalent Fractions and Decimals
Player Hits At Bats
Batting Average (thousandths)
Miguel Cabrera
Ichiro Suzuki
Hitsat Bats
195 ÷ 576 ≈ 0.339
224 ÷ 695 ≈ 0.322
195 576195576
224 695 224695
To convert a fraction to a decimal, divide the numerator by the denominator.
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
Write each fraction as a decimal. Round to the nearest hundredth, if necessary.
Additional Example 1: Writing Fractions as Decimals
A. 14
1.00 9.0 5.000
B. 95 C. 5
3
4 5 30.2
– 820
– 200
14 = 0.25
5 1
– 540
.8
– 400
95
= 1.8
1
– 3
20
.6
– 1820
– 18
6
20– 18
2
53 ≈ 1.67
6
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Equivalent Fractions and Decimals
Examples for Notebook
1) ½
2) 9%
3) 0.65
4) 2 1/10
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
The decimals 0.75 and 1.2 in Example 1 are terminating decimals because the decimals comes to an end. The decimal 0.333…is a repeating decimal because the decimal repeats a pattern forever. You can also write a repeating decimal with a bar over the repeating part.
0.333… = 0.3
0.8333… = 0.83
0.727272… = 0.72
Copy the Green only
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
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Equivalent Fractions and Decimals
Lesson Quiz
Write each fraction as a decimal.
1.
3. 4.
Write each decimal as a fraction in simplest form.
5. 0.42
7. If your soccer team wins 21 out of 30 games,
what is your team’s winning rate?
2.6253.2
2150
69 8
165 2.
218
6. 8.625
0.70
710
1120 0.550.7
5 8
or 8
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Equivalent Fractions and Decimals
Classwork/Homework:
Worksheet
You may begin it now.