Column Multiplication: 2-digit × 1-digit

Teaching Notes

Emphasize place value when recording carries. Practice the standard algorithm method consistently.

Vocabulary

carry over: Moving a digit to the next place value.

place value: The value of a digit based on its position.

Common Mistakes

• Dropped carry
• Forgetting to add the carry.
• Incorrectly multiplying carry.
• Place value errors.
• Right-to-left confusion.

Differentiation

Discussion Questions

• Why do we carry over digits?
• How is this similar to addition regrouping?
• When might you use this skill?
• Does order of multiplication matter?

Extension Activities

• Multiply 3-digit by 1-digit.
• Use multiplication games.
• Solve word problems.

Parent Tip

Have your child calculate the cost of buying 3 or 4 of the same item.

Skill Cluster

Multiplication & Division

Estimated Time

10 minutes

Skills Practiced

Prerequisites

• 822
• Basic multiplication facts
• Place value understanding
• Two-digit addition with regrouping

Next Steps

• Multiply 3-digit by 1-digit
• Multiply 2-digit by 2-digit
• Column Multiplication: 3-digit × 1-digit
• Column Multiplication: 2-digit × 2-digit