Đổi: 2,25=9/4

Số lớn là:

      2,25 : (9-4)*9=4,05

Số bé là:

         4,05-2,25=1,8

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

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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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

2,25 = 9/4

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

Số bé là: 2,25 : 5 x 9 = 4,05 

tỉ số=2.25=9/4

Số bé là:

2.25:(9-4)x4=1.8

Đáp số:1.8

ti so la 2,25/1

hieu so phan bang nhau la 1,25

vay so be la

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

so be la 1,8 h minh nha ban 

X-2.25Y=0

va X-1=2.25

giaipt X=4.05

          Y=1.8

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

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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