Column Addition: 3-Digit (3 Addends) (763)

Teaching Notes

Add three numbers per column; write multiple carries if needed.

Common Mistakes

• Adding only two of three addends in a column
• Losing a carry when adding the third number
• Forgetting to carry
• Misaligning digits
• Incorrect mental addition
• Regrouping errors

Differentiation

Discussion Questions

• Why is place value important in column addition?
• When do you need to regroup?
• How is carrying similar to regrouping?
• What happens if you forget to carry?

Skill Cluster

Number Sense & Operations

Estimated Time

12 minutes

Skills Practiced

Prerequisites

• 761
• 762
• Two-digit addition with regrouping
• Understanding place value to hundreds
• Adding three single-digit numbers

Next Steps

• Column addition with four 3-digit addends
• Column addition with 4-digit numbers
• Multi-digit subtraction with regrouping
• Column Addition: 3-Digit (4 Addends)
• Column Addition: 4-Digit (3 Addends)
• Multi-Digit Subtraction: Regrouping