1.the square is divided into five rectangles ,the perimeter of ea_英语解答

1.the square is divided into five rectangles ,the perimeter of each reactangle is 30 cm,if you don't set x can you work out the perimeter of this square?
2.a small square 's side length is 4cm ,if we make 9 squares like this into a big square,what is the perimeter of this big square?
3.we puzzled a big rectangle with some small rectangles,the area of the big rectangle is 270cm²,can you work out the perimeter of big rectangle?
4.three squares with the side length 15cm were puzzled into a rectangle ,what is the perimeter of this rectangle?

人气：324 ℃　时间：2020-05-14 20:54:59

解答

①将一个正方形划分成为五个相同的长方形,每个长方形（题目打错了）的周长为30厘米,你可以不用设X就求出这个广场周长吗?
30/5*（5-1）*4=96（cm）square应翻译成正方形
②一个小正方形的边长为4厘米,如果我们使之成为一个大正方形需要9个这样的小正方形,这个大正方形的周长是多少?
9=3*34*3*4=48（cm）side length意思是边长
③我们用一些小长方形拼成一个大长方形,大长方形的面积是270平方厘米,你能算出大长方形的周长吗?
题目缺少条件,做不出来.
④三个边长15厘米的正方形拼成一个长方形,这个长方形的周长是多少?
15*（3+1）*2=120（cm）