2條對我來講好難既英文數學(升中一的) [複製鏈接]

1.There are 6 Arts books in a bookcase.The number of Arts books in that bookcase is 25% that of Scientific

fictions,and the number of Scientific fictions  is 40% of the whole number of books .How many books are there

in the bookcase?

2.Bobby has one piece of rectangular  building block and one piece of cubic building block .The rectangular 

block has length 4.5cm and breadth 4cm while each side of the cubic block is 3cm.It is given that the volumes

of the two building blocks are the same.Find the height of the rectangular block.

如有打錯,請出聲。如果知道答案的,請加以解釋 

1)
6 / 25% / 40%
= 6 * 4 / 40%
=24 / 40%
=24 * 2.5
=60 Books.

1.There are 6 Arts books in a bookcase.The number of Arts books in that bookcase is 25% that of Scientific fictions,and the number of Scientific fictions  is 40% of the whole number of books .How many books are there in the bookcase?

書箱裏有6本arts books
arts books的數目是scientific fictions數目的25%
scientific fictions的數目是所有書數目的40%
問書箱有多少本書

已知arts books有6本
那麼scientific fictions的數目就是 = 6 / 25% = 24
書箱所有書的數目 = 24 / 40% = 60



2.Bobby has one piece of rectangular  building block and one piece of cubic building block .The rectangular block has length 4.5cm and breadth 4cm while each side of the cubic block is 3cm.It is given that the volumes of the two building blocks are the same.Find the height of the rectangular block.

Bobby有一個長方體和一個正方體
長方體長4.5cm,闊4cm
正方體邊長3cm
它們體積相同
問長方體的高

正方體體積 = 3 x 3 x 3 = 27cm³
長方體體積 = 27
長方體高 = 27 / 4 / 4.5 = 1.5cm

真係唔該哂2位,我已完全明白了.......