The purpose of this activity is for students to compare numbers represented in different ways. Students place the numbers in order from least to greatest. Students may create alternate representations for each number in order to compare them. For example, students may represent each number with a drawing, or write the two-digit number that matches each card (MP2).

• Display Set A.
• Invite previously identified students to share.
• “How are these methods alike?” (They both showed the tens and ones. They both compared tens first.)

The purpose of this activity is for students to compare numbers less than 99 to the benchmark numbers 5, 10, 50, and 99.

Students may use a variety of methods. Students may consider the relative magnitude of numbers (49 is one away from 50), use the value of the tens and ones (22 goes after 10 because 2 tens is more than 1 ten), and count (I know 97, 98, 99) to put the numbers in order. The emphasis is on the order of the numbers rather than the exact placement since this is not a number line. During the Activity Synthesis, students share how they ordered the numbers.

• Display the list of given numbers.
• Invite students to share different methods for determining where to place each number.
• As students share, fill in each number in the correct order.