ریاضیاتدوره: چهارصد واژه ضروری برای آیلتس / فصل 21
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In this video we’re going to be looking at words connected with maths with mathematics.
And here are your seven words constant, deduct, integer, fraction, median, mean, theorum.
And your first word is constant, constant. a constant is a thing or a value that always stays the same it never changes.
So for example, the speed of light is a constant, It never changes.
So for example, the constants of nature are certain numbers that describe the laws of physics.
Two significant constants have been found in a number of research studies.
The most widely known constant is the speed of light.
So you can have a constant of something, a fundamental constant a basic constant, a universal constant, a mathematical constant.
And here’s your next word deduct, deduct.
When you deduct an amount from a total, you subtract it from the total, you take it away from the total.
So for example, the company deducted this payment from his compensation.
Up to 5 percent of marks will be deducted for spelling mistakes.
Taxes will be automatically deducted at the end of the month.
So you can deduct from, deduct from a salary for example.
You can have tax deductions, automatically deducted.
And deduct is a verb so deducts, deducting, deducted and deduction is the noun.
Some synonym subtract, remove, withdraw.
And your next one is integer, integer.
An integer is an exact whole number, it’s a whole number such as 1, 7, 24, five hundred and seventy three million, four hundred sixty three thousand, two hundred and seventy eight is a whole number as opposed to a number with fractions or decimal.
So for example, prime numbers are positive integers that can only be divided by themselves and 1.
They asked patients to score the degree of discomfort on a 0-6 integer scale.
Choose an integer between 1 and 9.
So you can choose an integer, you can an have a positive integer and negative integer, and then and an integer scale.
So integer integers is the plural of course ,and some synonyms whole number, digit.
And when you don’t have a whole number when you don’t have an integer you often have a fraction.
So fraction is part of a whole number and also suggests part of a thing such as a cake fraction of a cake.
So for example, only a fraction of the work was completed on time.
A quarter or one over four is a fraction.
Multiply the fraction by a whole number.
So you can have a fraction of something, a small fraction, a tiny fraction and you can represent a fraction with a picture they have.
Some synonyms for Fraction portion, chunk, part.
And your next word is median, median.
The median value are a set of numbers is the middle number when they are arranged in order.
So if you have the numbers 2 3 6 9 and 10.
The median is 6.
It’s the middle, in a range of numbers which is in order.
For example, the median sentence for hard drugs offences increase from 150 days in 1982 to 240 in 1986.
Pessimists point out that the median price for new homes has slipped thing as a good thing.
And the median age for retirement has increased to 67.
So we talk about median income, median age, median price, median number is a common collocations.
And some synonyms for median sensual, middle, average, midpoint.
Is another word for average.
And a mean is a number.
But is the average of a set of numbers. so for example if you have the numbers 1 3 4 8 9 if you add those numbers up you get 25 and there were five numbers there so you do 25 divided by five.
And the answer is five.
So the mean of those numbers is 5.
Where was the median of those five numbers is four.
For example, take 120 values and calculate the mean.
The mean score for 16 year olds is 87 percent.
What is the mean age of entrance into the army.
We talk about mean school, mean average, mean age, the mean concentration of something.
Some synonyms for mean average, is the only one really that you could use, average.
Finally theorem, theorem
Not theory by the way theorem.
A theorem is a statement in mathematics or in logic that can be proved to be true by reasoning.
So for example.
This was the central mathematical theorem underpinning his entire series.
The theorem is hard to prove.
It can take years of effort to prove some theorems.
You can have a mathematical theorem, and he often talk about proving a theorem, you prove a theorem.
And some synonyms, axiom, law, rule.
So very Your seven maths words constant, deduct, integer, fraction, median, mean and theorem.
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