Create a Grade 3 lesson plan on subtracting two-digit numbers with borrowing.

Here is a very short and simple Grade 3 Mathematics lesson plan based on the picture:

Lesson Plan: Subtracting Two-Digit Numbers (with Borrowing)

• Topic: Subtraction with Borrowing
• Grade Level: Grade 3
• Time: 45 minutes

1. Lesson Objectives:

• Students will subtract two-digit numbers using the vertical method.
• Students will understand how to "borrow" from the tens place.

2. Materials Needed:

• Counting blocks (tens and ones)
• Whiteboard or blackboard
• Worksheet

3. Lesson Steps:

• Step 1: Review Easy Subtraction (5 minutes)

  • Solve problems like $54 - 23$ using the vertical form.

• Step 2: Learn to Borrow (20 minutes)

  • Introduce the problem $45 - 27$.
  • Explain that we cannot take 7 from 5.
  • Show how to "borrow" 1 ten from the 4 tens (making it 3 tens).
  • Add 10 ones to the 5 ones (making it 15 ones). Use blocks to show this.
  • Subtract: $15 - 7 = 8$ (ones) and $3 - 2 = 1$ (tens).
  • The answer is $\boxed{\text{18}}$.

• Step 3: Practice Together (15 minutes)

  • Work on more problems like $63 - 28$ together, using the borrowing steps.

• Step 4: Homework (5 minutes)

  • Give students problems to practice borrowing at home.