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DA
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H24
26 tháng 1 2016 lúc 16:15

Đổi: 2,25=9/4

Số lớn là:

      2,25 : (9-4)*9=4,05

Số bé là:

         4,05-2,25=1,8

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HQ
26 tháng 1 2016 lúc 16:18

thương:2,25=225/100=9/4

hiệu:2,25

hiệu số phần bằng nhau là:

9-4=5(phần)

số bé là:

2,25:5x4=1,8

đáp số:SB:1,8

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PQ
26 tháng 1 2016 lúc 16:19

Đổi: 2,25=9/4

Số lớn là:

      2,25 : (9-4)*9=4,05

Số bé là:

         4,05-2,25=1,8

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NT
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TH
22 tháng 1 2016 lúc 15:49

Vì thương của chúng bằng hiệu của chúng và bằng 2,25

Nên tỉ số của chúng là 9/4 và hiệu bằng 2,25 (Đến đây giải bài toán "Tổng -Tỉ"

Hiệu số phần bằng nhau là: 9 - 4 = 5 phần.

Số bé là: 2,25 : 5 x 4 = 1,8

Đáp số: 1,8

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KH
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NH
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SL
22 tháng 7 2016 lúc 8:42

gfggfgf

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TM
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

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LK
22 tháng 7 2016 lúc 8:43

mk chẳng bít !

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PB
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NQ
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 

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NM
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TX
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

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NC
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

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NM
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NC
26 tháng 2 2016 lúc 7:55

so be la 1,8 h minh nha ban 

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BD
26 tháng 2 2016 lúc 9:41

X-2.25Y=0

va X-1=2.25

giaipt X=4.05

          Y=1.8

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KH
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H24
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

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TH
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

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VQ
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ND
3 tháng 1 2017 lúc 13:11

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ND
3 tháng 1 2017 lúc 13:08

de ma 13 do

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TM
3 tháng 1 2017 lúc 13:17

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k minh nha

ket ban nua
 

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