Multiply 1-Digit by Whole Tens (521)

Standards

Printable Aids

Teaching Notes

Emphasize using known multiplication facts and place value understanding. Students can multiply the non-zero digits, then append the zero.

Vocabulary

Whole Tens: Numbers like 10, 20, 30, ending in zero.

Product: The result of multiplication.

Common Mistakes

• Forgetting to append the zero at the end of the product.
• Incorrectly multiplying the basic facts (e.g., 3x20 instead of 3x2).
• Adding instead of multiplying (e.g., 3 + 20 instead of 3 x 20).

Differentiation

Discussion Questions

• How is 3 x 20 related to 3 x 2?
• What is special about multiplying by a number ending in zero?
• Can you think of a real-life situation where you multiply a number by a multiple of 10?
• How does understanding place value help solve these problems efficiently?

Extension Activities

• Use base-ten blocks.
• Relate to skip counting by tens.
• Practice with larger multiples.

Parent Tip

Ask: 'If 4 friends each have $10, how much money do they have?'

Skill Cluster

Multiplication Strategies

Grade Level

3-4

Skills Practiced

Prerequisites

• Multiplication Facts
• Place Value
• Basic Multiplication Facts (0-10)
• Understanding Place Value (Tens and Ones)

Next Steps

• Multi-Digit Multiplication
• Estimating Products
• Multiply 1-Digit by 2-Digit Numbers
• Mental Math Strategies for Multiplication
• Multiply 1-Digit by Whole Hundreds
• Multiply 1-Digit by 2-Digit Numbers (No Regrouping)
• Fact Families: Multiplication and Division