When solving mathematical expressions, multiplication must be performed before subtraction according to the order of operations (PEMDAS), and when multiple operations of the same priority exist, they should be evaluated from left to right. For example, in the expression 6 - 6 * 6 - 6, the correct solution is -36, not 0, because the multiplication (6 * 6 = 36) must be calculated first, followed by the subtractions from left to right (6 - 36 = -30, then -30 - 6 = -36).
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深掘り
Only 1 in 5 Can Solve This Simple Math Problem!追加:
6 - 6 * 6 - 6 = what?
Here, 6 - 6 gives us 0.
Multiply this 6 - 6 gives us 0.
0 * 0 gives us 0. But, this answer is not correct.
Now, I will apply PEMDAS rule to solve this math correctly. Here, P E M D A S, PEMDAS.
According to PEMDAS rule, at first we have to work with parentheses, then exponent, then multiplication or division, then addition or subtraction.
Remember, multiplication and division have same priority. For this, we have to work left to right.
And addition and subtraction have same priority.
For this, we have to work left to right, also.
Here, there is no parenthesis, there is no exponent, there is no division, there is no addition. Here, existing only multiplication and subtraction.
According to order of operation, multiplication have higher priority than subtraction. Therefore, at first we have to work with this multiplication. Here, this 6 minus this 6 * 6 gives us 36.
Minus this 6.
According to order of operation, when we have more than one subtraction, then we have to work left to right. Therefore, at first we have to work with this subtraction, then this subtraction.
6 - 36 gives us negative 30.
Minus this 6.
-30 - 6 gives us -36.
And this is correct answer. Thanks for watching the video. Please like, comment, share, and subscribe.
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