5 out of 100 students got this right! 😳 Are you among the 5?

Ajouté : 2026-05-26

[00:00:00]Students nightmare. Now when you give students a question that involves more than one division, they get confused.

[00:00:08]Okay? And most of them used to fail it.

[00:00:10]And what most of them used to do is to just use this three and divide this three and use this one and divide this one and they will say that their answer is equal to one. But that is wrong way of solving this. Okay, that is a very lazy mindset whenever you do something like that. So whenever you want to solve this particular question, you have to note that according to mathematical rule, whenever you have more than one division in a particular question, you are going to solve from the left to the right. Okay? And aside from that particular rule, you are going to also note that we are going to be using the K CF rule. Okay? Or CF rule. Okay? Now this K here means keep.

[00:01:01]Now this C here means change and this F here means flip.

[00:01:08]If you don't want to use this particular rule, you can use this one which means copy. This C here means copy. This C here means change.

[00:01:18]And this F here also means flip. Okay.

[00:01:21]So you can use the KCF rule or you use this particular CCF rule. Okay. Now let's use this K CF rule. Now the keep here means we are going to keep this three. So we keep three. We write the three down and change the division to multiplication. We change the division to multiplication. And when we do that we are going to flip this fraction here.

[00:01:44]So we have 3 / 1. And 3 / 1 is 3. So we divide this by 1 divide by 3 then divide by 3. We going to take this gradually to avoid confusion. Okay. So from here remember that according to PEMDAS if you have a multiplication and division you are going to this is division and this is multiplication. Sorry this is multiplication and this is division.

[00:02:10]Okay. And you are to solve from the left to the right. whenever you have this particular um whenever you are you have multiplication and division in one question. Okay. So what we are going to do here is to multiply 3 * uh 3 is 9 then divide by 1 / 3ide by 3. Okay. So from here you can see that we still have a fraction here and we have two division. You have to solve from the left to the right. Okay. So from here we write we apply this rule again. We write nine. Okay. And change the division to multiplication and flip this. So we are going to have 3 / by 1 and that is C3.

[00:02:50]Then divide by 3. So from here we multiply 9 * 3 is 27ide by 3. Okay. So in in this particular case here we are to just divide straight away because there is no fraction involved again. Okay. So all we need to do is to uh divide 27 / 3 will give us 9. Okay. And the correct answer to this particular question is nine not one.

[00:03:17]Okay, I hope this is clear. Now let's look into this question that involves more than one bracket. Okay, we have square bracket and we have parentheses.

[00:03:27]Okay, so for us to solve this, we are going to be using the order of operation which is PEMDAS. Let's write that down.

[00:03:34]P E M D A S. Okay. Now where P is parenthesis, E is exponent, M is multiplication, D is division, A is um addition and S is subtraction.

[00:03:50]Okay. And whenever you have multiplication and division in a particular question, you are to solve from the left to the right. Okay? And you have if you have addition and subtraction, you solve from the left to the right as well. So looking at our question which is three open um square bracket 2 * 4 / 4 in parentheses 3 - 1 then close square bracket. Okay. So looking at this we first of all attend to the parentheses first before we can solve for that. So we have 3 open square bracket 2 * 4 / 4 then in parenthesis we have 3 - 1 and that is 2. Okay, we'll close our square bracket. Now, we are still going to attend to whatever that is inside here. And looking at here, you can see that we have multiplication, division, and multiplication. And because multiplication and division are of the same priority, we are going to attend to the multiplication here first.

[00:04:49]Okay? So, we have three open square brackets. 2 * 4 is 8. Okay.

[00:04:56]Divide by 4 * 2. Now, from here, we attend to the division. First we have 3 open square bracket 8 / 4 is 2 * 2.

[00:05:10]Okay. So from here we have 3 * 2 * 2 is 4. Okay. So 3 * 4 = 12. And this is the correct answer and correct step of solving this question. Okay. Now let's look into this question as well. In this question we have more than one parenthesis. Okay. So we are going to attend to that first according to the order of operation which is PM das. Okay PM dash okay remember that this is parenthesis this is exponent this is multiplication this is division addition and subtraction. Okay and remember that we say that these two are of the same priority and these two are of the same priority. Okay. So first of all attend to the parentheses. So we have 6 * 3 + 1 is 4. Okay, divide by 2 in parentheses 3 + 6. Okay, so the second thing we are going to do here is to attend to this parentheses. So we have 6 * 4 / 2 * 3 + 6 is 9.

[00:06:18]So from here because multiplication and division are of the same priority we are going to multiply first. So what most people will do here is to divide first because they thought that division is of higher priority to multiplication but no we are going to multiply first because both of them are the same. So from here we are going to have 6 * 4 is um 24.

[00:06:40]Okayide by 2 * 9. Now from here we divide first. 24 / 2 is 12 * 9. Okay.

[00:06:50]Now 9 * 12. Let's gradually multiply this. 9 * 2 is 18. We write 8 and keep one here. 9 * 9 is 9 * 1, sorry, is 9 + this one is 10. So, we have 108 as the correct answer. Thank you so much for watching to the end. Please do well to share this video. die.