Add Four Numbers (Tens and Ones) (428)

Teaching Notes

Encourage students to look for pairs that make 10 or multiples of 10 first. This strategy simplifies the addition process and promotes mental math.

Vocabulary

Addend: A number that is added to another number.

Sum: The result when two or more numbers are added.

Common Mistakes

• Not grouping numbers strategically to simplify addition.
• Miscalculating basic addition facts or combining numbers incorrectly.
• Forgetting to combine all four numbers in the final sum.

Differentiation

Discussion Questions

• Which numbers did you choose to add first and why?
• How did looking for pairs that make 10 help you?
• Can you think of other strategies to add these numbers?
• When is it most helpful to add numbers in a specific order?

Extension Activities

• Add four 2-digit numbers.
• Use number bonds to group addends.
• Add numbers in different orders.

Parent Tip

Have your child add the prices of four grocery items.

Skill Cluster

Number Sense and Operations

Estimated Time

15 minutes

Skills Practiced

Prerequisites

• Add 2-Digit and 1-Digit Numbers
• Making 10
• Place Value (Tens and Ones)

Next Steps

• Add Three-Digit Numbers
• Adding More Than Four Numbers
• Add Three Numbers (Tens and Ones)
• Add Four Numbers (Hundreds, Tens, Ones)