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How can we use patterns to help us round 87.684 to the nearest hundredth, tenth and whole number?. closer to. closer to. In this lesson you will learn how to round decimals to any place by using patterns. rounding. $36.87. $40.00. 0.5. 0.5. =. 2.5. 2. 3. - PowerPoint PPT Presentation
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How can we use patterns to help us round 87.684 to the nearest hundredth, tenth and whole
number?
closer tocloser to
In this lesson you will learn how to round decimals to
any place by using patterns.
Let’s Review
rounding
$36.87 $40.00
Let’s Review
2 3
0.5 0.5=
2.5
A Common Misunderstanding
Misapplying a rounding “rule” in order to solve a problem.
4.48 4.5 5.0
4.48 4.0
Core Lesson
Emily rounded some decimals to the nearest whole number. What patterns do you notice?
Rounds Down Rounds Up
9.1 9.5
9.2 9.6
9.3 9.7
9.4 9.8
9.9
9 10
If the tenths portion of the decimal is 0.5 or greater it rounds up. If the tenths portion of the decimal is 0.4 or less it rounds down. But why?
closer tocloser to
Rounds Down Rounds Up
9.1 9.5
9.2 9.6
9.3 9.7
9.4 9.8
9.9
9.5
Core Lesson
Andy rounded some decimals to the nearest tenth. What patterns do you notice?
Rounds Down Rounds Up
6.31 6.35
6.32 6.36
6.33 6.37
6.34 6.38
6.39
6.30 6.40
If the hundredths portion of the decimal is 0.05 or greater it rounds up. If the hundredths portion of the decimal is 0.04 or less it rounds down. But why?
closer tocloser to
Rounds Down Rounds Up
6.31 6.35
6.32 6.36
6.33 6.37
6.34 6.38
6.39
6.35
Core Lesson
Can we use the same patterns to help us round decimals to the nearest hundreth?
Rounds Down Rounds Up
1.201 1.205
1.202 1.206
1.203 1.207
1.204 1.208
1.209
1.200 1.210
If the thousandths portion of the decimal is 0.005 or greater it rounds up. If the thousandths portion of the decimal is 0.004 or less it rounds down. But why?
closer tocloser to
1.205
Rounds Down Rounds Up
1.201 1.205
1.202 1.206
1.203 1.207
1.204 1.208
1.209
Core Lesson
87 88
How can we use patterns to help us round 87.684 to the nearest hundredth, tenth and whole number?
87.684whole number = 88
closer to
tenth
87.6 87.7
= 87.7hundredth
87.68 87.69
closer to
= 87.68
Core Lesson
87 88
How can we use patterns to help us round 87.684 to the nearest hundredth, tenth and whole number?
87.684
closer tocloser to
88 87.7 87.68
87.6 87.787.68 87.69
In this lesson you have learned how to round
decimals to any place by using patterns.
