# Base ten blocks and numbers

### Base ten blocks and numbers

#### Lessons

In this lesson, we will learn:

• How to use base ten materials to represent numbers
• Writing numbers in expanded form

Notes:

• Regrouping

• 10 ones can be regrouped into 1 ten:

10 tens can be regrouped into 1 hundred:

10 hundreds can be regrouped into 1 thousand

• Introduction
Introduction to Base Ten Materials
Overview of lesson

• 1.
Representing Numbers with Blocks
Show these numbers using base ten blocks
a)
28

b)
346

c)
105

• 2.
Numbers from Blocks
What number is this?
a)

b)

c)

d)

• 3.
Regrouping
Regroup hundreds as thousands, tens as hundreds and ones as tens
a)
2 hundreds + 12 ones + 17 ones

b)
9 hundreds + 14 tens + 15 ones

• 4.
Representation in Expanded Form (Using numerals and words)
Write the number in expanded form using numerals and words
a)
89

b)
831

c)
4216

• 5.
Representation in Expanded Form (Using numerals)
Write the number in expanded form using numerals
a)
74

b)
561

c)
3183