Multiply Two-Digit with one-digit number

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Multiplying numbers is a fundamental math operation, often viewed as repeated addition. It involves calculating the total of one number added to itself a certain number of times, as specified by another number. Here’s a detailed guide on how to multiply numbers, along with examples:

Basics of Multiplication:

  1. Understand the Terms:
    • Multiplicand: The number being multiplied.
    • Multiplier: The number you are multiplying by.
    • Product: The result of the multiplication.
  2. Single-Digit Multiplication: This is often memorized as multiplication tables. For example, 3×4=12, which means 3 added to itself 4 times.

Steps for Multiplying Larger Numbers:

  1. Write the Numbers: Place the larger number above the smaller number, aligning them by their rightmost digits.
  2. Multiply Each Digit Individually: Starting from the rightmost digit of the bottom number, multiply it with each digit of the top number. Write the product below the line, aligning to the right.
  3. Carry Over: If a product is more than 9, write the unit digit below the line and carry over the tens digit to the next multiplication.
  4. Move to the Next Digit: For each new digit in the bottom number, shift one place to the left in your answers. Multiply each digit as before.
  5. Add the Results: Sum all the products you have written to get the final answer.


  1. Simple Multiplication Without Carry-Over:
    • 23×4
    • Multiply 4 by each digit of 23: 4×3=12 (write 2, carry 1), 4×2=8 plus carry-over 1 equals 9.
    • The product is 92.
  2. Multi-Digit Multiplication With Carry-Over:
    • 123×45
    • Multiply 5 by each digit of 123: 5×3=15, 5×2=10 plus carry-over 1 equals 11, 5×1=5 plus carry-over 1 equals 6. Write 615.
    • Next, multiply 4 (treated as 40) by 123. Shift one place to the left: 4×3=12, 4×2=8 plus carry-over 1 equals 9, 4×1=4 plus carry-over 1 equals 5. Write 4920 below 615.
    • Add 615 and 4920 to get 5535.
  3. Multiplying With Zeros:
    • 200×3
    • Multiply 3 by each digit of 200: 3×0=0, 3×0=0, 3×2=6.
    • The product is 600.


  • Start from the Right: Always begin with the rightmost digit of the bottom number.
  • Align Your Products: Proper alignment ensures accuracy, especially when adding the results.
  • Practice: Like all math skills, multiplication becomes easier and more intuitive with practice.


Multiplication is a powerful math operation that extends beyond simple addition, allowing for quicker calculation of total values. Understanding and practicing multiplication, from basic single-digit to more complex multi-digit calculations, is crucial for mathematical proficiency and everyday applications. Remember to multiply each digit carefully, manage carry-overs, and add up the products correctly to get the final result.


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