2.NBT.1.a: Understanding Place Value Within 100

Challenge Worksheet
I can understand that two digits represent tens and ones for numbers within 100.

Problem 1

Explain why the digit 4 in the number 47 has a different value than the digit 4 in the number 74.

Problem 2

Show 63 in three different ways: standard form, expanded form, and word form.

Problem 3

I am a 2-digit number. My tens digit is 3 more than my ones digit. My ones digit is 2. What number am I?

Problem 4

The number 85 can be written as 8 tens + 5 ones. Show two other ways to represent this number using place value.

Problem 5

Create a two-digit number where the tens digit is twice the ones digit. Explain your thinking.

Problem 6

Compare the values of the digit 7 in these numbers: 72, 37, and 17. Which position gives 7 the greatest value?

Problem 7

If you have 12 tens and 3 ones, what number do you have? Show your work.

Problem 8

Create a number riddle for a 2-digit number between 50-60. Give clues about each digit's value and position.

Problem 9

Explain how you would help a friend understand the difference between the number of tens and the value of the tens place in 46.

Problem 10

Design your own place value problem using a 2-digit number. Write the problem and solve it.