When solving mathematical expressions, always follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) to ensure correct results; for example, in the expression 1 - 6 × -5, you must first multiply 6 by -5 to get -30, then subtract -30 from 1 to get 31, rather than subtracting 1 from 6 first.
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Hey guys and welcome to our channel. We want to find the value of this math expression. What is the answer of this question? Can you solve it correctly?
Most people when solving this math expression, first they go for this subtraction between 1 and 6. All right, instead of this expression -5.
Then they go for this subtraction between 1 and 6 in parentheses and write instead of this expression -5.
Finally, they go for this multiplication between -5 and -5 and write instead of this expression positive 25.
But this answer is not correct because according to the order of operations, which is PEMDAS, we have to solve this math expression in this way. First, parentheses, then exponent, then multiplication or division, and then addition or subtraction. Remember that multiplication and division have the same level of priority and addition and subtraction have the same level of priority, First, [snorts] here we have one multiplication because when a number is placed next to parentheses, it means multiplication.
And usually, we don't write this multiplication for brevity.
Now, according to the PEMDAS that is here, in first step, we have one parentheses that we have to solve it first.
If you do this multiplication and this subtraction first, it is wrong.
1 - 6 = -5.
Let's write the expression. We have 1 6 * -5 in parentheses.
In next step, we have one subtraction here and one multiplication here. And as we know, according to the PEMDAS, multiplication has higher priority than subtraction. So, we have to solve this multiplication first.
6 * -5 = -30.
Finally, we have 1 - -30.
Negative * negative gives us positive.
And 1 + 30 = 31.
So, our final answer to this question is 31. Thank you for watching. Please like and subscribe if you like this video.
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