1.NOS.B: Understand place value and representations of numbers.

Understand place value and representations of numbers.

1.NOS.B.3Extend understanding of 10 as a group, collection, or bundle of ten ones, called a “ten,” to compose and decompose two-digit numbers. a. Compose and decompose two-digit numbers into tens and ones using objects or drawings, and equations (e.g., 10 + 4 = 14; 38 = 30 + 8). b. Describe a given number as the correct number of tens and ones (e.g., 14 is one ten and four ones; 38 is three tens and eight ones). c. Compose and decompose two-digit numbers in more than one way (e.g. 46 = 41 + 5 or 46 = 23 + 23).1.NOS.B.4Represent whole numbers as lengths from 0 on a number line (horizontal and vertical) with equally spaced points corresponding to whole numbers.1.NOS.B.5Compare two numbers within 100 by reasoning about values of tens and ones digits and the location of the numbers on a number line. Record the results of comparisons with the symbols >, =, and <.1.NOS.B.6Estimate the location of numbers on a number line by reasoning about their relationship to benchmark numbers (e.g. 10, 50, 100).

1-on-1 AI tutoring aligned to 1.NOS.B. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →