Understanding Place Value

Base-Ten Models

I have 1 hundred and 1 ten. What number am I?

I have 1 hundred and 1 ten. What number am I?

1 hundred 1 ten 0 ones

I have 1 hundred and 1 ten. What number am I?

1 1 0

I have 1 hundred and 1 ten. What number am I?

1 1 0

I have 1 hundred and 1 ten. What number am I?

110

I have 2 tens and 8 ones. What number will I be if you add 4 tens?

10 20 30 40 50 60

61626364

65666768

I have 1 hundred, 5 tens, and 2 ones. What number will I be if you take away 5 tens?

I have 1 hundred, 5 tens, and 2 ones. What number will I be if you take away 5 tens?

1 hundred 0 tens 2 ones

I have 1 hundred, 5 tens, and 2 ones. What number will I be if you take away 5 tens?

1 0 2

I have 1 hundred, 5 tens, and 2 ones. What number will I be if you take away 5 tens?

1 0 2

I have 1 hundred, 5 tens, and 2 ones. What number will I be if you take away 5 tens?

102

I am the greatest even number that has 3 tens. What number am I?

What’s the greatest number of hundreds I can have?

How many tens?

What’s the greatest number of ones I can have and still be even?

I am the greatest even number that has 3 tens. What number am I?

9 hundreds 3 tens 8 ones938

I have 23 ones. What number am I?

2 tens 3 ones

I have 23 ones. What number am I?

23

I have a dozen tens. What number am I?

1 hundred 2 tens 0 ones

I have a dozen tens. What number am I?

120

Can you show 23 with your blocks?

Let’s write this number in expanded form. What is the value of each group of blocks?

20 + 3 = 23

2 tens is 20.

10 20

1

2

3

3 ones is 3.

Can you show 145 with your blocks?

Let’s write this number in expanded form. What is the value of each group of blocks?

100 + 40 + 5 = 145

4 tens is 40.

10 20

1

2

3

5 ones is 5.1 hundred is 100.

30 40

4

5

100

Use Your Noodle Questions:

• How many different ways can you show 21?

• I have 3 blocks. The blocks can be of any value. What could one total value be? What are all the possible values I could have?

Noodle Questions are from Creative Publications 20 Thinking Questions for Base Ten Blocks (Grades 2-3). ISBN 1-56107-792-5

Great Job!