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Hackernoon logoWhat we need to know about Rounding and Midpoint by@james-johnson

What we need to know about Rounding and Midpoint

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@james-johnsonJames Johnson

I am a researcher and a technical content writer. A math teacher since 2007. I love travelling, Love

Round a Number: Rounding a number means obtaining an approximate value that allows it to be used without cluttering up with useless precision for what we want to do, but in such a way that this approximation remains as close as possible to the exact value.

The definition itself explains the need for rounding for mathematical purposes. When we stuck badly in complex decimal values, rounding proved to be a good attempt. Apart from so many reasons behind this question, why should we compensate with rounding while dealing with a mathematical expression.

Why is Rounding in Math Important?

Hiring your brain for extraordinary attempts converts it into an exhausted box. Make your text smart as you’re with your work. The same performance could be performed by rounding the extreme queries into polite queries. 

Collecting a wide range of possibilities after making precise statements. E.g, 

Returning $67.4478 to $67.45.

The fractions 312/937 with ⅓.

Expression √2 with 1.414.

In a commercial calculation case, we often get a result with more decimals than the requested precision. You have to know how to round the price correctly, to the nearest euro cent.

Provide Accuracy in Laboratory Analysis

For instance, a total phosphorus value of 5.896 mg/L suggests that you have achieved a high degree of accuracy, but it’s also something that should raise a red flag for those who read it. 

Because a lot of the laboratory equipment does not have that level of precision this degree of precision is unachievable. Again, the result can't be more accurate than the less accurate part of the analysis. Which implies you will have to round numbers to reflect the truth of the outcome.


The method for numbers is as follows: Drop all digits. In case the number instantly into the right of the numbers that are substantial is between 6 and 9, round one unit up. As an example, if you want to round the number 53.68 to 3 important digits, around the 6 digit to 7 because the non-important digit 8 is between 6 along with 9. This is how the outcome is 53.7. 

BOD Calculations

The calculations for BOD (biochemical oxygen demand) use several numbers, all having different amounts of notes. Carry out the calculations, then round the result. For a real-life example utilizing the BOD equation, x dilution = BOD value, and inserting normal numbers we have: x = 150.24 mg/L. Since the number with the smallest amount of significant digits utilized in this calculation dictates how many important digits should be in the final response, round the final response to two important digits. 

Midpoint Definition

Midpoint indicates the central point of a line segment having two equal edges. 

In mathematical object expressions, the midpoint can be calculated by determining the equidistance ratio for specific objects. Median is its reference where any number from the whole midpoint is located.

Median- The value at position (n + 1) ÷ 2, where n denotes the number of values ​​in a data set. To calculate the median, first order the data (sort them in ascending order). The median is the number at the midpoint. 

Midpoint formulation and estimations 

Sometimes you necessitate finding the point that is precisely midway between two other levels. To understand, you might need to find a line that cleaves (divides into two halves) a given line segment. This mid spot is known as the midpoint of the given line. 

In below, there are three probabilities for finding and averaging the midpoint value:

For Simple Numbers: If you’ve given two numbers 6 and 10 and asked to get their midpoint value. The simple and swift solution for this calculation is, to sum up, both numbers and then divided by 2 (make an average). 

→ 6+10 / 2 = 8

So, 8 is the midpoint between the line having one arm of 6 and another arm of 10m in length.

For Rational Values: The decimal acquiring expressions are a little bit heavy to deal with than those of simple questions. If we’re gonna say to find midpoint P between (6.4, 3) and (-10.7, 4) then it doesn’t mean that the question has a pseudopodia solution. But the answer process is quite smooth as follows:

I’ll insert the midpoint formula, and simplify,

→ [6.4 +( -10.7)/ 2 , 3 + 4/ 2]

→ [ -4.3 / 2 , 7 / 2]

→ [ -2.15, 3.5]

The liability for midpoint is to provide signals for central accuracy in any object. Limiting the unexpecting errors in calculations and enhancing the structural discipline through midpoint figuring.

The manual formulas & calculations are very important to learn but one can also use online calculators like midpoint calculator or rounding calculator for learning & practice.

Author profile picture

@james-johnsonJames Johnson

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I am a researcher and a technical content writer. A math teacher since 2007. I love travelling, Love


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