Florida B.E.S.T. MA.4.NSO.1.4

Math4th GradeUnderstand place value for multi-digit numbers.

The Standard

Round whole numbers from 0 to 10,000 to the nearest 10, 100 or 1,000.

Florida B.E.S.T. Standards for Mathematics

Teacher's field guide

What Students Need to Do: Students identify the target place and examine the digit immediately to its right. They choose the closest benchmark multiple and write the rounded value.
What Mastery Looks Like: Students accurately round the same number to different places, including halfway values and numbers near 10,000. They can name the two benchmark multiples and explain which is closer.
Common Misconceptions: Some students change only the target digit and forget to replace digits to its right with zeros. Others check the wrong digit or round every number up. Halfway values may cause confusion, especially when the rounded result crosses into a new thousand.
How to Assess It: Exit ticket: Round 6,450 to the nearest 10, 100, and 1,000. Explain one answer using the two nearest benchmark multiples.

Lesson moves

Give pairs number cards and a floor number line; students place each card, then move it to the closest labeled ten, hundred, or thousand.
Ask why 4,650 rounds differently to the nearest hundred and thousand, then have students write explanations using benchmark numbers.
Play Rounding Match with number cards and target cards; students earn a point by stating the correct rounded value first.
Show local attendance or population figures, then have students round each number to make a quick estimate for a news headline.

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