Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

10. Adding using the standard algorithm (C)

teaches Common Core State Standards CCSS.Math.Content.4.NBT.B.4 http://corestandards.org/Math/Content/4/NBT/B/4
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8
Quick Assign

You have saved this lesson!

Here's where you can access your saved items.

Dismiss

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Understand the role of place value in the standard algorithm for addition.

Students bring prior knowledge of addition strategies from 3.NBT.A.2. This prior knowledge is extended to addition of whole numbers within 1,000,000 as students apply the standard algorithm for addition. A conceptual challenge students may encounter is that regrouping is required when the sum of a place value column of digits exceeds 9. 

The concept is developed through work with a parallel example of addition using the partial sums method, which clarifies the role of place value in the standard algorithm for addition.

This work helps students deepen their understanding of number because it illustrates how all methods of addition require composing and decomposing numbers by place value, regardless of how the steps are recorded.

Students engage in Mathematical Practice 8 (Look for and express regularities in repeated reasoning) as they compare the partial sums method and the standard algorithm for addition, understanding that base-ten operations require composition and decomposition into base-ten units.

Key vocabulary:

  • algorithm
  • compose
  • decompose
  • expression
  • regroup
  • vertical

 

Related content

Appears in

Applying place value concepts in whole number addition and subtraction

Provide feedback