Can You Beat This Math Challenge?

Added: 2026-05-18

[00:00:01]Hey guys, welcome to this video. In this video we want to find the value of this expression.

[00:00:06]5 / 1/5 * 5 Are you ready to solve? Let's go ahead and get this started.

[00:00:14]First we do this multiplication, 1/5 * 5.

[00:00:20]We can easily cancel this five and this five. So here we have just one.

[00:00:26]And the 5 / 1 equals 5.

[00:00:33]But this answer is not correct.

[00:00:36]Because according to the order of operations, multiplication and division have equal priority and we have to work from left to right.

[00:00:45]So here first we have to do this division, then this multiplication.

[00:00:50]If we do this multiplication before this division, it is wrong.

[00:01:09]So first we have to do this division, 5 / 1/5.

[00:01:15]According to the KCF rule, K stands for keep, C stands for change, and the F stands for flip. We can write keep the first fraction, change division to multiplication, and flip the second fraction.

[00:01:31]And here we have times 5. Okay?

[00:01:34]5 * 5 gives us 25.

[00:01:39]So we have 25 * 5. Okay?

[00:01:45]5 * 5 gives us 25. So we write 5 here and carry two here.

[00:01:52]5 * 2 = 10 and the 10 + 2 = 12. So, we have 125 and this is our final answer to this problem.