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Number And Operations In Base Ten

Domain: Number and Operations in Base Ten

Grade: 3

Core Content

Cluster Title: Use place value understanding and properties of operations to perform multi-digit arithmetic. (Note:

A range of algorithms may be used.)

Standard 1: Use place value understanding to round whole numbers to the nearest 10 or 100.

MASTERY Patterns of Reasoning:

Conceptual:

Students will understand the basic principles of rounding whole numbers (if the digit is five or greater the digit to the

left moves up one number, if the digit is four or less the digit to the left stays the same).

Procedural:

Students can identify the place to which they are rounding.

Students can identify the digit that affects how the number is rounded.

Students can identify the rounding choices (digit stays the same or rounds higher).

Students can round whole numbers to the nearest 10 or 100.

Representational:

Students can represent rounding using number line, place value drawings, base ten blocks, or hundreds charts.

Supports for Teachers

Critical Background Knowledge

Conceptual:

Students will know place and value of whole numbers less than or equal to 1,000.

Procedural:

Students can read and write multi-digit whole numbers less than or equal to 1,000.

Representational:

Students can model numbers less than or equal to 1,000 (e.g., base-ten numerals, number names, expanded form,

number lines, base-ten blocks, hundreds chart).

Academic Vocabulary and Notation

base-ten, benchmark number, compare, digits, expanded form, order, place value, round a whole number, standard form

Code: 3NBT1

Number And Operations In Base Ten