Let us understand it by taking two examples.

• Multiply 99 × 97

• Multiply 103 × 105

Steps to perform this are:-

• Find by how much the number is more or less than the power of 100 and write it on the right side of the vertical line.

• Either cross subtracts or cross add. This will form the first part of the final answer.

• Multiply the right side of the vertical line and this shall form the right side of the result.

                     03                                                          15

• Add this multiplied number to the end giving 9603 and 10815 respectively.

This is how you can multiply numbers close to 100 in just 3 steps.

Try some on your own.

• 102 x 105
• 98 x 93
• 99 x 99

thank you!