Maryland Math 4.NOS.A.1

4.NOS.A.1 is a cluster heading. These are the individual standards under it.

• 4.NOS.A.1.a

  Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form.

• 4.NOS.A.1.b

  Estimate quantities by reasoning about their location on a number line, their relationship to benchmark numbers, and rounding to any place.

• 4.NOS.A.1.c

  Compare two multi-digit numbers by reasoning about the values of the digits and the location of the numbers on a number line. Record the results of comparisons ...

01

What Students Need to Do

Students read and write numbers up to 1,000,000 in digits, words, and expanded form. They use digit values and number lines to estimate, round to a named place, and compare numbers with >, <, or =.

02

What Mastery Looks Like

A student writes 507,040 as five hundred seven thousand forty and 500,000 + 7,000 + 40. They place it between 500,000 and 510,000, round it to 510,000 to the nearest ten thousand, and explain why 507,040 < 570,040.

03

Common Misconceptions

Students may read 507,040 as 57,040 or write its expanded form as 500,000 + 7,000 + 400. Others compare from the ones place, space numbers evenly on a line without checking their values, or round using the wrong digit.

04

How to Assess It

Exit ticket: Write 483,725 in words and expanded form. Mark it and 489,100 on a number line from 480,000 to 490,000, round 483,725 to the nearest thousand, and compare the two numbers using <, >, or =.

1. 01

   Give pairs digit cards and a place value mat; have them build 628,405, read it aloud, and write its expanded form.

2. 02

   Ask: Which is greater, 607,940 or 670,940? Explain using digit values and a number line from 600,000 to 700,000.

3. 03

   Play rounding relay: Teams round 472,685 to the nearest ten, hundred, thousand, ten thousand, and hundred thousand.

4. 04

   Give students town populations of 483,725 and 489,100; have them compare the populations and round both to the nearest ten thousand.

• 4.NOS.B.3

  Fluently add and subtract multi-digit whole numbers within 1,000,000.

• 3.NOS.A.1

  Apply and extend place value understanding to whole numbers within 10,000.

• 4.NOS.B.4

  Extend place value understanding and basic facts to multiply a multi-digit whole number by a multiple of ten.