Lesson 10 Place Value Comparisons (Part 1)

- Let’s use place value to compare three-digit numbers.

Warm-up Number Talk: Add Tens

Find the value of each expression mentally.

$36 + 40$
$46 + 30$
$59 + 40$
$69 + 30$

Activity 1 Compare by Place

Problem 1

Who has more? How do you know?

Base-ten diagram. — Mai

Base-ten diagram. 2 hundreds. 1 ten. 1 one. — Tyler

Problem 2

Compare the base-ten diagrams.

Write each value as a three-digit number. Use the symbols $<$ , $>$ , or $=$ to compare the numbers.

Activity 2 Compare Hundreds, Tens, and Ones

Compare the base-ten diagrams. Write each value as a three-digit number. Use the symbols $>$ , $<$ , or $=$ to compare the numbers.

In the last problem, how do you know which value was greater?

Practice Problem

Problem 1

Here are diagrams for two numbers.

Base-ten diagram. 2 hundreds. 4 tens. 1 one. — A

Base-ten diagram. 2 hundreds. 3 tens. 7 ones. — B

Which two numbers are pictured in the diagrams.
Which number is larger? How do you know?
Use $<$ or $>$ to compare the numbers.