Maryland Math 4.NOS.A.1.b
The Standard
- 4.NOS.A.1
- Apply and extend place value understanding to multi-digit whole numbers within 1,000,000.
Estimate quantities by reasoning about their location on a number line, their relationship to benchmark numbers, and rounding to any place.
Maryland College and Career Ready Standards for Mathematics (2025) · GENERALIZE PLACE VALUE UNDERSTANDING FOR MULTI-DIGIT WHOLE NUMBERS.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students place whole-number quantities on a number line and compare them with nearby benchmarks. They use those distances to estimate and round to a given place.
What Mastery Looks Like
- A student places 4,680 between 4,000 and 5,000 and uses 4,500 to show it is nearer 5,000. They also give 4,700 as the nearest-hundred estimate and explain why it is closer than 4,600.
Common Misconceptions
- Some students put 4,050 halfway between 4,000 and 5,000 instead of 4,500. Others round 4,680 to 5,000 even when asked for the nearest hundred.
How to Assess It
- Exit ticket: A crowd count is 6,480. Place it on a number line from 6,000 to 7,000, round to the nearest thousand and hundred, and name the midpoint used for each.
Lesson moves
Ways to Teach It
Tape a number line from 6,000 to 7,000 on the floor; students place cards for 6,480 and 6,500.
Partners explain why 6,480 rounds to 6,000 by thousands but 6,500 by hundreds, using number line sketches.
Partners draw four-digit number cards, race to write the nearest hundred and thousand, then check using marked midpoints.
Post a school fundraiser total of 8,760 donated cans; students write rounded totals to the nearest hundred and thousand for a newsletter.
Free download
Printable 4.NOS.A.1.b Worksheet
A ready-to-print activity worksheet aligned to 4.NOS.A.1.b, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- 2.NOS.A.5
Estimate quantities by reasoning about their location on a number line, their relationship to benchmark numbers (e.g. 10, 50, 100), and to assess reasonableness...
- 6.NOS.C.6.a
Estimate quantities by reasoning about their location on a number line, their relationship to benchmark numbers, and by rounding.
- 5.NOS.A.3.b
Estimate decimal quantities by reasoning about their location on a number line, their relationship to benchmark numbers (e.g. 0, 0.25, 0.5, 0.75, 1) and roundin...
- 3.NOS.A.1.c
Estimate quantities by reasoning about their location on a number line, their relationship to benchmark numbers, and rounding to nearest 10 or 100.
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.
Also for this standard:Make a WorksheetMake a QuizMake a Sub Lesson