Multiply by a Number between 100-109

Below is a really cool trick to multiply two numbers between 100-109. .

Look at the math problem 102 x 104 = ?

• Multiply one's digits.
  • 4 x 2 = 8. It needs to be two digits so write 08.
• Add one's digits.
  • 4 + 2 = 6. It needs to be two digits so write 06
• Write 1.

ANSWER is 10608.

Watch the math video below for a detailed explanation!

Practice Math Problems

1. What does 103 x 108 = ?
2. What does 101 x 105 = ?
3. What does 107 x 109 = ?
4. What does 104 x 109 = ?
5. What does 108 x 105 = ?
6. What does 102 x 107 = ?
7. What does 106 x 104 = ?