VQ

Hai số thập phân có thương và hiệu đều bằng 2,25. Vậy số bé là....

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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LB
3 tháng 1 2017 lúc 13:20

Đổi \(2,25=\frac{9}{4}\)

Tới bước này ta làm bài toán theo những bài toán hiệu - tỉ

Hiệu số phần bằng nhau là :

\(9-4=5\)( phần)

Giá trị của một phần là:

\(\frac{2,25}{5}=0,45\)

=> Số lớn là:

\(0,45.9=4,05\)

Số bé là :

\(4,05-2,25=1,8\)

Vậy ...

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LX
6 tháng 1 2017 lúc 15:26

1,8 đúng rồi

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NA
26 tháng 2 2018 lúc 11:56

Ai có sách CÔNG PHÁ ĐỀ THI HỌC SINH GIỎI CHUYÊN ĐỀ TOÁN RỜI RẠC VÀ TỔ HỢP không

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