Section C: Practice Problems Compare Numbers to 99

Section Summary

Details

We compared numbers using the number of tens and ones.

Base-ten diagram. 1 ten, circled and labeled. 7 ones.

Base-ten diagram. 3 tens, circled and labeled. 5 ones.

17 has 1 ten and 35 has 3 tens so 17 is less than 35.

$17 < 35$
17 is less than 35.

$35 > 17$
35 is greater than 17.

$35 = 35$
35 is equal to 35.

Problem 1 (Lesson 15)

Which number is greater, 54 or 36?
Show your thinking using drawings, numbers, or words.
Which number is less, 25 or 52?
Show your thinking using drawings, numbers, or words.

Problem 2 (Lesson 16)

Decide if each statement is true or false.
Show your thinking using drawings, numbers, or words.

$35 < 29$
$72 = 27$
$81 > 77$

Problem 3 (Lesson 17)

Write <, >, or = in each blank to make the statement true.

$47$ $43$
$73$ $63$
$85$ $85$
$9$ $96$

Problem 4 (Lesson 18)

Order the numbers from least to greatest:

Problem 5 (Exploration)

Noah says that there are more connecting cubes in B because it has more tens than A. Do you agree with Noah?
Show your thinking using drawings, numbers, or words.

Connecting cubes. 6 towers of 10 cubes. 15 single cubes. — A

Connecting cubes. 7 towers of 10 cubes. 3 single cubes. — B

Problem 6 (Exploration)

Andre correctly solved this problem, but his brother spilled water on some numbers.

Circle the numbers that are

greater than

A splash of water on top of the numbers in the problem.

but less than

Andre circled

List of numbers. 89, circled. 82, circled. 77, circled. 24. 19. 68, circled.

What numbers might be hidden from view?
Show your thinking using drawings, numbers, or words.