Place Value & Rounding
Rounding on a number line and using benchmark numbers; This example shows why 783 rounds to 800 when rounding to the nearest hundred
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Links
Below are files available for you to download. Some will be provided in class, but they are always nice to have available for reinforcement at home :)
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Standards:
4.NBT.1 Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents
in the place to its right.
4.NBT.3 Use place value understanding to round multi-digit whole numbers to any place.
All Standards information is taken from NC DPI. Feel free to take a look at the NC 4th Grade Common Core Unpacking Document!
4.NBT.1 Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents
in the place to its right.
- For example, recognize that 700 ÷ 70 = 10 by applying concepts of place value and division.
- Students should be able to answer questions such as: How is the 2 in the number 582 similar to and different from the 2 in the number 528
- Students need to know how to represent numbers up to one million.
- Standard Form: 123,456
- Word Form: One hundred twenty-three thousand, four hundred fifty-six
- Expanded Form: 100,000 + 20,000+ 3,000 + 400 + 50 +6
- Place Value Form: 1 hundred thousand 2 ten thousands 3 thousands 4 hundreds 5 tens 6 ones
- Students also need to be flexible with their thinking! For example, students should understand that 285 could also be 28 tens plus 5 ones or 1 hundred, 18 tens, and 5 ones.
- Thinking about money helps students with this (how could we get $285 if we only had tens and ones in our pocket?).
4.NBT.3 Use place value understanding to round multi-digit whole numbers to any place.
- The expectation is that students have a deep understanding of place value and number sense and can explain and reason about the answers they get when they round.
- Students need to use number lines and hundreds charts to explain HOW rounding works.
- Students should be able to round to the nearest million.
All Standards information is taken from NC DPI. Feel free to take a look at the NC 4th Grade Common Core Unpacking Document!