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22 tháng 7 2016
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
PH
1
28 tháng 2 2016
2,25 = 9/4
Hiệu số phần băng nhau là: 9 - 4 = 5 (Phần)
Số bé là: 2,25 : 5 x 9 = 4,05
ND
2
25 tháng 2 2016
ti so la 2,25/1
hieu so phan bang nhau la 1,25
vay so be la
2,25:1,25x1=1,8
ND
2
KS
2
S
19 tháng 7 2016
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
18 tháng 7 2016
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
VP
6
3 tháng 1 2017
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NV
1
25 tháng 1 2016
\(\frac{225}{100}\)= \(\frac{9}{4}\)
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
LN
0
PQ
6
Thêm câu nữa là ta thấy rằng hiệu của chúng và thương là 2.25 và sau khi đổi 2.25=9/4 thì thương của chúng tức là tỉ số là 9/4
Đổi:2,25=\(\frac{9}{4}\)
Số bé là:
2,25:(9-4)x4=1,8
Đáp số:1,8