Florida B.E.S.T. MA.4.NSO.2.6
The Standard
Identify the number that is one-tenth more, one-tenth less, one-hundredth more and one-hundredth less than a given number.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students adjust a decimal by 0.1 or 0.01 and name the result. They use place value to explain what changes, including cases that require regrouping.
What Mastery Looks Like
- Given numbers such as 3.47, 5.09, or 6.99, students find each nearby value accurately. They explain the changes with equations, decimal models, or place-value language.
Common Misconceptions
- Students may change the wrong place, treating 0.1 as 0.01. They may write 4.99 plus 0.01 as 4.910 or miss regrouping to 5.00.
How to Assess It
- Exit ticket: Starting with 7.05, add 0.1, subtract 0.1, add 0.01, and subtract 0.01. Show one equation and circle the digits that changed.
Lesson moves
Ways to Teach It
Build 2.36 with decimal blocks, then add or remove one tenth and one hundredth, recording each result.
Ask, “Why does subtracting 0.01 from 4.00 change more than one digit?” Students explain with a place-value chart.
Play Decimal Neighbor Match: students pair number cards with cards showing values 0.1 or 0.01 above or below.
Use dollar amounts, asking students to find prices ten cents or one cent higher and lower than each price tag.
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Related Standards
- MA.4.FR.1.1
Model and express a fraction, including mixed numbers and fractions greater than one, with the denominator 10 as an equivalent fraction with the denominator 100...
- MA.1.NSO.2.3
Identify the number that is one more, one less, ten more and ten less than a given two-digit number.
- MA.2.NSO.2.2
Identify the number that is ten more, ten less, one hundred more and one hundred less than a given three-digit number.
- MA.5.NSO.2.5
Multiply and divide a multi-digit number with decimals to the tenths by one-tenth and one-hundredth with procedural reliability.
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