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

[00:00:00]In this given expression in parentheses, 20 + 20 * 2 then divide by 20 divide by 20. Now, most people got this wrong. Let me show you how to do it in a very simple way. Now, the first thing we are going to write down is the order of operation which is PEMDAS, okay? P E M D A S, okay? Now, where P is parentheses, E is exponent, M is multiplication and D is division, okay? And this is addition and this is subtraction. And note that these two have the same priority and these two have the same priority. That is to say, whenever you see division and multiplication, irrespective of their position, you have to solve from the left to the right, okay? And the same thing is applicable to this addition and subtraction.

[00:00:48]So, let's solve this question. So, from here, we have to attend to the parentheses first because parentheses is of higher priority. So, inside the parentheses, we have addition and multiplication. And multiplication is of higher priority to addition, okay? So, we are going to have open parentheses 20 plus 20 * 2 = 40.

[00:01:09]Then divide by 20, then everything will be divided by 20, okay? So, from here, we'll have 20 plus um 40 and that is 60.

[00:01:21]Divide by 20, then divide by 20, okay?

[00:01:26]Now, the next thing I'm going to do is to rewrite this expression. I'm going to write 60, then divide by 20, putting this in parentheses, then this division line here, divide by 20, okay? So, from here, we'll have 60 divide by 20, then divide by 20.

[00:01:48]So, from here, this zero will cancel this zero. 6 / 2 will give us 3. So, we'll have 3 / 20, okay? And this is 3 / 20. Okay? So, if what I want us to get this in a decimal number. And for us to do that, we are going to use long division. And this is where the student most students find it very difficult to do. Okay? So, the next thing we are going to do is this 20 will be here because 20 is the divisor. Okay? Now, the three is the dividend. And the result we are going to get is called the quotient. Okay? Now, in solving long division, there are three steps that is composing for you to take. Now, the first step is division.

[00:02:36]The second step is multiplication. And the third step is subtraction. Okay? So, from here, looking at this, you know it's impossible for us to get 20 to divide three and give us a whole number. So, we are trying to get the decimal number. So, what we do? Because 20 cannot divide three. 20 / 3 is zero.

[00:02:58]It's not possible. So, we write zero here. Okay? So, we are not going to do anything further. The next thing we are going to do is to include zero so that 20 can be able to divide 30.

[00:03:11]And when we do that, we are going to add a decimal point here.

[00:03:15]Okay? So, now let's apply this step. The first step is division.

[00:03:19]20 / 30 is not possible, but we can find 1 20 inside this 30. So, we are going to write it down one here. Then multiplication. 1 * 20 = 20.

[00:03:30]Then the next step is subtraction.

[00:03:32]Then we'll subtract. 0 - 0 = 0.

[00:03:36]3 - 2 = 1. So, we have 10 here. Okay?

[00:03:39]Now, but looking at this, 10 cannot divide 20 cannot divide 10. Okay? So, the next thing we are going to do is to add another zero. Now, 100 / 20 will give us five.

[00:03:53]So, write that five here.

[00:03:55]Multiplication is next. 5 * 20 = 100.

[00:04:00]And we'll subtract. 100 - 100 is 000, okay? So, it simply means that our answer is 0.15 in decimal number or 3 / 20, okay?

[00:04:15]That's