Section 1
Writing Numbers in Expanded Form
Property
A multi-digit number can be written in expanded form by expressing it as the sum of the values of its digits.
For example, a four-digit number can be written as:
In this Grade 4 Eureka Math lesson, students extend their use of place value disks to solve three- and four-digit by one-digit multiplication problems, such as 2 × 324, by decomposing each factor into hundreds, tens, and ones. Students record partial products vertically and connect the disk representations to standard multiplication equations. This lesson builds directly on two-digit multiplication skills and reinforces expanded form and place value concepts.
Section 1
Writing Numbers in Expanded Form
A multi-digit number can be written in expanded form by expressing it as the sum of the values of its digits.
For example, a four-digit number can be written as:
Section 2
Calculating Products Using the Partial Products Algorithm
The partial products algorithm uses the distributive property to solve multiplication.
A multi-digit number is broken into the sum of its place values (expanded form), and each part is multiplied separately before adding the results.
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Section 1
Writing Numbers in Expanded Form
A multi-digit number can be written in expanded form by expressing it as the sum of the values of its digits.
For example, a four-digit number can be written as:
Section 2
Calculating Products Using the Partial Products Algorithm
The partial products algorithm uses the distributive property to solve multiplication.
A multi-digit number is broken into the sum of its place values (expanded form), and each part is multiplied separately before adding the results.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter