Maybe 1 in 10 People Can Solve This Math Problem

Añadido: 2026-05-23

[00:00:00]Hey guys, welcome to this video. In this video we want to find the value of this expression. 1 - 9 * 1 - 9. Are you ready to solve? Let's go and get started.

[00:00:13]1 - 9 gives us -8.

[00:00:19]And again here inside this parenthesis we have 1 - 9.

[00:00:26]So -8 * -8 which equals positive 64.

[00:00:36]But this answer is not correct. Because according to the order of operations which is PEMDAS PEMDAS P stands for parenthesis, E stands for exponents, M and D stands for multiplication and division, and A and S stands for addition and subtraction.

[00:00:56]First we have to do parenthesis, then exponents, then multiplication or division, and then finally addition or subtraction. Remember that multiplication and division have equal priority and we have to work from left to right.

[00:01:12]And the same applies to addition and subtraction.

[00:01:15]In this expression we have one subtraction, one multiplication, and the one parenthesis. Inside this parenthesis we have one subtraction. Here we have a multiplication because in mathematics when a number is placed next to parenthesis it means multiplication and we usually don't write the multiplication sign for brevity. Okay?

[00:01:35]So according to the PEMDAS, first we have to do this parenthesis, then this multiplication, and then finally this subtraction. If you do this subtraction before this multiplication or this parenthesis, it is wrong.

[00:01:56]So first we have to do this parentheses.

[00:02:01]Inside this parentheses, we have 1 - 9, which gives us -8.

[00:02:09]So, we have 1 - 9 then * -8.

[00:02:17]Now, we have one subtraction and one multiplication.

[00:02:21]According to the PEMDAS, multiplication has higher priority than subtraction, because multiplication comes before subtraction.

[00:02:29]So, here, first we have to do this multiplication. 9 * -8 gives us -72.

[00:02:42]So, we have 1 -72.

[00:02:47]Now, negative * negative gives us positive.

[00:02:52]So, we have 1 + 72.

[00:02:58]Which equals 73.

[00:03:02]And this is our final answer to this problem.

[00:03:07]The correct answer is 73.