Wyoming Math 4.NF.7
The Standard
Compare and order decimal numbers to hundredths and justify by using concrete and visual models. Record the results of comparisons with the words “is greater than,” “is equal to,” “is less than,” and with the symbols >, =, and <.
2023 Wyoming Mathematics Content and Performance Standards · Understand decimal notation for fractions, and compare decimal fractions.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students shade 10-by-10 grids to show decimal amounts. They use the shaded squares to put numbers in order, then record comparisons in words and with <, >, or =.
What Mastery Looks Like
- Given 0.39, 0.4, and 0.43, a student shades 39, 40, and 43 squares on equal-sized grids. They write 0.39 < 0.4 < 0.43 and read the comparisons in words. They also show why 0.4 = 0.40.
Common Misconceptions
- Students may think 0.39 is greater than 0.4 because 39 is greater than 4. Some treat 0.4 and 0.40 as different amounts or reverse < and > when writing a comparison.
How to Assess It
- On an exit ticket, ask students to shade grids for 0.39, 0.4, and 0.40, then order them and write the comparisons in words and symbols. Ask them to explain how the grids show both the order and the equality.
Lesson moves
Ways to Teach It
Give students two 10-by-10 grids to shade 0.4 and 0.39, then place the grids side by side and explain which shows more.
Ask, 'Does adding a zero to 0.5 change its value?' Have partners draw grids and write a sentence using 'is equal to.'
Deal cards labeled 0.09, 0.9, 0.19, and 0.91; students race to arrange them on a number line and check with grids.
Show price tags for $0.70, $0.67, and $0.07; students shade dollar grids, then list the prices from cheapest to most expensive.
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Printable 4.NF.7 Worksheet
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