Multiply by 25
Multiplying by 25 is one of the most common problems that you will encounter.
Look at the math problem 25 x 684 = ? Let's see how the trick works.
- Divide the number by 4.
- 684 / 4 = 171 with a remainder of 0. Write 171.
- If you have a remainder of 0 then add 00 at the end.
- If you have a remainder of 1 then add 25 at the end.
- If you have a remainder of 2 then add 50 at the end.
- If you have a remainder of 3 then add 75 at the end.
- Since we had a remainder of 0 at the end we are going to add 00 to our answer. Write 00.
ANSWER is 17100.
Watch the math video below for a detailed explanation!