注目の話題: あまりにも稚拙な旦那にウンザリです; マイナンバーカードを持ってない人へ; なぜ入籍しない？

science,math and English

No.325　13/10/26 20:49
名無し0 ( 50代 ♂ ) あ+あ-

【Ratio and proportion.】

I'm going to express the answer with other way.😃

When thinking the whole amount of the 仕事 as 1,Taro does one-tenth of the whole amount a day,and Hanako does one-fifteenth.☝

If adding two of the whole amount of the 仕事 together,it's like the next,though it's just a repetition of the former equation.💦

One-tenth plus one-fifteenth equals one-sixth.

As the whole amount of 仕事 is 1,the work makes progress at the rate of one-sixth a day.

One divided by one-sixth equals six.

They can finish the work in six days.

Almost all of the people may think the former expression is a perfect score as arithmetic,but children should practice to write a composition,for its ability has been requested for the children so as to cultivate mathematical thinking power,or logical ability for the expression.😃

In particular,as to abstract general idea,it's important to expressing sentences for themselves and to recognize the idea.😺