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Nguyễn Thanh Hữu
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Stars Lord
22 tháng 7 2016 lúc 8:42

gfggfgf

Trần Quỳnh Mai
22 tháng 7 2016 lúc 8:43

Đổi : 2,25 = \(\frac{9}{4}\)

Ta có sơ đồ :

Số bé : l-----l-----l-----l-----l  2,25

Số lớn :l-----l-----l-----l-----l-----l-----l-----l-----l------l

Theo sơ đồ , hiệu số phần bằng nhau là :

       9 - 4 = 5 ( phần )

Số bé là :

  2,25 : 5 x 4 = 1,8

 Đáp số : 1,8

LINH ĐAN SO KUTE
22 tháng 7 2016 lúc 8:43

mk chẳng bít !

Phan Huy Bình
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Nguyễn Ngọc Quý
28 tháng 2 2016 lúc 14:29

2,25 = 9/4

Hiệu số phần băng nhau là: 9 - 4 = 5 (Phần)

Số bé là: 2,25 : 5 x 9 = 4,05 

Nguyễn Đức Mạnh
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Thành Trần Xuân
25 tháng 2 2016 lúc 8:09

tỉ số=2.25=9/4

Số bé là:

2.25:(9-4)x4=1.8

Đáp số:1.8

Nguyễn Dăng Chung
25 tháng 2 2016 lúc 8:13

ti so la 2,25/1

hieu so phan bang nhau la 1,25

vay so be la

2,25:1,25x1=1,8

Nguyễn Đức Mạnh
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Nguyễn Dăng Chung
26 tháng 2 2016 lúc 7:55

so be la 1,8 h minh nha ban 

bolyl vc dtntsp
26 tháng 2 2016 lúc 9:41

X-2.25Y=0

va X-1=2.25

giaipt X=4.05

          Y=1.8

Kim Soo Hyun
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Sarah
19 tháng 7 2016 lúc 6:18

2,25 = $\frac{9}{4}$94 

Hiệu số phần bằng nhau là:

9 - 4 = 5 phần

Số bé là:

2,25 : 5 x 4 = 1,8

Đáp số : 1,8

Thám Tử THCS Nguyễn Hiếu
18 tháng 7 2016 lúc 19:53

2,25 = \(\frac{9}{4}\)

Hiệu số phần bằng nhau là:

9 - 4 = 5 phần

Số bé là:

2,25 : 5 x 4 = 1,8

Đáp số : 1,8

Vũ Phạm Ngọc Quỳnh
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Nguyễn Ngọc Dương
3 tháng 1 2017 lúc 13:11

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Nguyễn Ngọc Dương
3 tháng 1 2017 lúc 13:08

de ma 13 do

Tô Bá Hiền Minh
3 tháng 1 2017 lúc 13:17

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k minh nha

ket ban nua
 

Ngô Văn Minh Trí
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Quỳnh Anh Otaku
25 tháng 1 2016 lúc 19:39

\(\frac{225}{100}\)\(\frac{9}{4}\)

Ta có sơ đồ :

Số bé : I-----I-----I-----I-----I

Số lớn :I-----I-----I-----I-----I-----I-----I-----I-----I-----I

Số bé là :

2,25 : ( 9 - 4 ) x 4 = 1,8

Đáp số : 1,8

Lê Nguyễn Trúc Anh
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phan quochuu
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Nguyễn Minh Nguyên
19 tháng 1 2016 lúc 9:02

1.8

violympic đúng ko?

Vũ Quý Đạt
19 tháng 1 2016 lúc 9:04

1,8

tick mình lên 3-00 zới

Nguyễn Bùi Đại Hiệp
19 tháng 1 2016 lúc 9:04

1.8

trong violympic đúng đấy tick nhé