注目の話題: レストランに赤ちゃんを連れてくるな; 結婚したら専業主婦になってほしいと言われた; 仕事の注意ってしたらダメなんでしょうか？

science,math and English

No.307　13/09/14 22:25
名無し0 ( 50代 ♂ ) あ+あ-

【Not being able to set up an equation from a question composed of sentences.】

I'm sure plenty of people think an ordinary grown-up can usually understand the general idea of the four basic operations of algebra easily.😚

However,there are some situations in which we don't have to use a difficult equation as long as we understand addition,subtraction,multiplication,and division enough.😃

For instance,there is mathematics for insurance.It's one of fields in practical math.We calculate our life expectancy,rate of life insurance,and sum of money for pension with the theory of probability,and differential calculus 微分.😲

For instance,there is a question composed of sentences like the next.☝

It's 30 minutes which is average time of shopping for customers in a supermarket.3 customers come in and other three come out a minute at the supermarket.The situation continues.😃

We can find amount of the customers in the supermarket with the next equation.😃

30 minutes divided by 20 seconds is 90 people.