Maybe 1 in 10 People Can Solve This Math Problem

Added: 2026-06-02

[00:00:01]Hey guys, welcome to this video. In this video we want to find the value of this expression. 1 minus 10 times 1 minus 10.

[00:00:10]Are you ready to solve? Let's go ahead and get started. 1 minus 10 gives us negative 9.

[00:00:19]And again here inside this parenthesis we have 1 minus 10.

[00:00:28]So, negative 9 times negative 9 equals positive 81.

[00:00:37]But this answer is not correct.

[00:00:40]Because according to the order of operations, which is PEMDAS, P stands for parenthesis, E stands for exponent, M and D stands for multiplication and division, and the A and the S stands for addition and subtraction.

[00:00:58]First we have to do parenthesis, then exponents, then multiplication or division, and the finally addition or subtraction. Remember that multiplication and division have equal priority and we have to work from left to right.

[00:01:15]And [snorts] the same applies to addition and subtraction.

[00:01:18]In this expression we have one subtraction, one multiplication, and one parenthesis. Inside this parenthesis we have one subtraction.

[00:01:27]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.

[00:01:39]Okay? So, according to the PEMDAS, first we have to do this parenthesis, then this multiplication, and the finally this subtraction. If we do this subtraction before this multiplication or this parenthesis, it is wrong.

[00:02:05]So, first we have to do this parenthesis.

[00:02:09]Inside this parenthesis, we have 1 - 10, which equals -9.

[00:02:16]So, we have 1 - 10 then * -9.

[00:02:24]Now, in this expression, we have one subtraction and one multiplication.

[00:02:29]According to the PEMDAS, multiplication has higher priority than subtraction because multiplication comes before subtraction. So, here first we have to do this multiplication. 10 * -9 gives us -90.

[00:02:49]So, we have 1 - -90.

[00:02:54]Now, negative times negative gives us positive.

[00:03:00]So, we have 1 + 90.

[00:03:05]1 + 90 = 91.

[00:03:10]And this is our final answer to this problem.

[00:03:16]The correct answer is 91.