Lesson 4: Subtraction of Two-Digit Numbers (No Regrouping)

For Grade 3 Mathematics

Lesson Objective:

Students will be able to subtract two-digit numbers without regrouping. This lesson reinforces the basic concepts of subtraction by correctly using the tens and ones place values.

Understanding Subtraction without Regrouping:

When subtracting two-digit numbers, we first subtract the digits in the ones place. Then, we subtract the digits in the tens place. 'Without regrouping' means that the ones digit of the first number is greater than or equal to the ones digit of the second number.

Example: 47 - 23

  • First, subtract the ones place: $7 - 3 = 4$
  • Second, subtract the tens place: $4 - 2 = 2$
  • Answer: 24
47 - 23
24

This method makes subtracting numbers easy.

Activity 1: Vertical Subtraction!

Solve the vertical subtraction problems below and enter the answer.

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Activity 2: Horizontal Subtraction!

Solve the horizontal subtraction problems below and enter the answer.

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