NC.2.NBT.4

Compare two three-digit numbers based on the value of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Step 1: Lesson Standards & Learning Goals

Unpacking Clarification

Students are expected to compare three-digit numbers (up to 999) presented in various forms, including number or base-ten form, word form, and expanded form. Students should have ample experiences communicating their comparisons in words before using symbols.

In Grade 2 students are only expected to compare two numbers at a time using reasoning about place value to support the use of the greater than, less than, and equals sign.

Sample Essential Questions

How is place value used to compare 2 three-digit numbers?

How are these symbols ( <, >, and = ) used to compare two numbers?

What are the mathematical symbols that represent “more than”, “less than” and “equal to”?

How can number comparisons be recorded using mathematical symbols?

Vocabulary

compare
comparison
digit
equal sign (=)
greater than (>)
less than (<)
place value
symbol

Students will be able to...

Compare two three digit numbers based on meanings of the hundreds, tens, and ones digits.
- - Use concrete materials (place value charts, number lines, 100 chart, etc.) to compare two three-digit numbers.
Compare numbers in base-ten form (standard), word form, and expanded form.
Justify comparisons between numbers using the terms greater than, less than, and equal to.
- - Use the symbols >, <, and = to record comparisons of two three-digit numbers.

Students will know...

Place value is used to compare numbers.
Manipulatives, Hundred boards, Number Lines, and Place Value Mats are useful tools in comparing numbers.
Symbols can be used in place of words in mathematics.
- equal sign (=) means the same as
- greater than (>) means more than
- less than (<) means fewer than