Round multi-digit numbers to their largest place value.
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You’ll want to avoid using terms like “round up” and “round down” since these terms can be confusing for students. “Rounding up” a number results in a change in the value of the place to which you’re rounding, where “rounding down” does not. Often students will change the value mistakenly as a result.
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Is 4,125 closer to 4,000 or 5,000? Plot 4,000 and 5,000 on the two outermost spots on the number line below. Then plot 4,125 to prove your answer.
Rounding on the Number Line, accessed on Sept. 11, 2017, 8:36 p.m., is licensed by Illustrative Mathematics under either the CC BY 4.0 or CC BY-NC-SA 4.0. For further information, contact Illustrative Mathematics.
Modified by The Match Foundation, Inc.?
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Round to the place value mentioned below. Use the number line to model your thinking.
a. Round 7,621 to the nearest thousand |
b. Round 15,002 to the nearest ten thousand |
c. Round 308,724 to the nearest hundred thousand |
7, 621 $$\approx$$ __________ | 15,002 $$\approx$$ __________ | 308,724 $$\approx$$ __________ |
Grade 4 Mathematics > Module 1 > Topic C > Lesson 7 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.It takes 34,958 gallons of water to manufacture a new car. Sammy thinks that rounds up to about 40,000 gallons. Susie thinks it is about 30,000 gallons. Who rounded correctly, Sammy or Susie? Use pictures, numbers, or words to explain.
Grade 4 Mathematics > Module 1 > Topic C > Lesson 7 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.?