Câu 1: bằng \(\frac{17}{30}\)

câu 2 : >

1, (y-2/5):4/15=5/8

(y-2/5)=5/8.4/15

y-2/5=1/6

=>y=1/6+2/5

=>y=17/30

vậy y=17/30

2,>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

hihi

\(\Leftrightarrow\dfrac{-32-6}{12}< x< \dfrac{-57-50}{30}\)

\(\Leftrightarrow\dfrac{-38}{12}< x< \dfrac{-107}{30}\)

=>-3,1<x<-3,5(vô lý)

\(\dfrac{20}{35}\) = \(\dfrac{20:5}{35:5}\) = \(\dfrac{4}{5}\) vậy \(\dfrac{4}{5}=\dfrac{20}{35}\)

\(\dfrac{5}{8}\) = \(\dfrac{5\times5}{8\times5}\) = \(\dfrac{25}{40}\)

\(\dfrac{28}{35}\) = \(\dfrac{28:7}{35:7}\) = \(\dfrac{4}{5}\)

48%

Cảm ơn bạn Phùng Bảo Ngân nha 

jjttj

1;Đ

2;S

bài 2:

2,06%=

B.

bn hứa là k nha

Bài 1 

a)S 

b)Đ

Bài 2

2,06%=\(\frac{206}{10000}\)

a, 1,234 tấn = 1 tấn 2 tạ 3 yến 4kg 5 hg

b , 9,2876 km = 9 km 2 hm 8 dam 7 m 6 dm

a, 1,2345 tấn = 1 tấn 2  tạ 3 yến 45 kg 5 hg

Phần b mình chịu vì bạn thiếu đơn vị mà

Chúc bạn thi cuối kì đạt điểm cao

a, 1,2345 tấn =....1...... tấn.....2..... tạ..3........ yến.......45... kg.....5.....hg

b, 9,2876 km =9....km...... 2...hm....... 8........dam.... 7....m............6.....dm.........

0,201  ;0,202  ;0,203  ;0,204   ;0,205

k nha>_<

0,21 ; 0,22 ; 0,23 ; 0,24 ; 0,25 ; 0,26 ; 0,27 ; 0,28 ; 0,29 ; 2,291

0,21; 0,22 ; 0,23 ; 0,24 ; .... 

k tui nha

thanks

3/5=27/45

7/9=35/45

Vì: 27/45<35/45=>3/5<7/9

3/5 < 7/9

3/5 < 7/9

a ) \(6\frac{3}{4}=3\frac{1}{2}+3\frac{1}{4}\)

b ) \(1\frac{3}{4}=5\frac{1}{2}-3\frac{3}{4}\)

Bạn giải thích giúp mình câu b với.

Có câu b rồi mà bạn