2-Digit Minus 1-Digit Subtraction (No Regrouping) (245)

Lesson Plan

Subtracting Single Digits

Standards

Printable Aids

Teaching Notes

Reinforce place value understanding before subtraction. Encourage students to subtract the ones digits first, then the tens digits. Emphasize that no regrouping is required for these problems.

Vocabulary

Tens digit: The digit in the tens place.

Ones digit: The digit in the ones place.

Common Mistakes

• Subtracting the larger digit from the smaller digit in the ones place when the 1-digit number is larger than the ones digit of the 2-digit number (e.g., 32 - 5 incorrectly becomes 30 - 3, but this worksheet specifically avoids borrowing/regrouping scenarios).
• Misaligning numbers when written vertically.
• Forgetting to subtract the ones digit from the 2-digit number.

Differentiation

Discussion Questions

• How is subtracting a 1-digit number from a 2-digit number similar to subtracting two 1-digit numbers?
• Why is it important to subtract the ones place first?
• Can you think of a time when you would need to subtract this way in real life?

Extension Activities

• Use base-ten blocks.
• Draw the tens and ones.
• Create your own problems.

Parent Tip

Use a hundreds chart to visualize subtracting single digits from two-digit numbers.

Skill Cluster

Number Operations and Place Value

Grade Level

2-3

Skills Practiced

Prerequisites

• Basic Subtraction Facts
• Place Value
• Subtracting within 20
• Understanding Place Value (tens and ones)

Next Steps

• Two-Digit Subtraction
• Regrouping Strategies
• Subtract 1-digit from 2-digit (with borrowing)
• Subtract 2-digit from 2-digit (no borrowing)
• Subtract 1-digit from 2-digit (with regrouping)
• Subtract 2-digit from 2-digit (no regrouping)