hình ảnh chỉ mang tính chất tham khảo

chữ đẹp đấy

a ) Sắp sếp theo thứ tự tăng dần :

- 2015 ; - 53 ; - 25 ;  - 7 ; - 1 ; 0 ; 7 15 ; 53 

b ) Rút gọn phân số rồi so sáh 

\(\frac{3.4+3.7}{6.5+24}\) = \(\frac{1.1+1.7}{3.5+8}\)= \(\frac{7}{23}\)

\(\frac{23.5-23}{46+3.23}\) = \(\frac{1.5-1}{2+3.1}\) = \(\frac{4}{5}\)

\(\frac{7}{23}=\frac{7.5}{23.5}=\frac{35}{115}\)

\(\frac{4}{5}=\frac{4.23}{5.23}=\frac{92}{115}\)

Vì \(\frac{35}{115}< \frac{92}{115}\Rightarrow\frac{3.4+3.7}{6.5+24}< \frac{23.5-23}{46+3.23}\)

Tk mk nha 

Các bn viết chi tiết ra giúp mk nha  Thanks 

A = \(\frac{3.4+3.7}{6.5+9}\)

A = \(\frac{3.\left(4+7\right)}{3.\left(10+3\right)}\)

A = \(\frac{11}{13}\)

B = \(\frac{6.9-2.17}{63.3-119}\)

B = \(\frac{2.\left(27-17\right)}{7.\left(27-17\right)}\)

B = \(\frac27\)

A = \(\frac{11}{13}\) = \(\frac{77}{91}\)

B = \(\frac27=\frac{26}{91}\)

\(\frac{3.4+3.7}{6.5+9}=\frac{3\left(4+7\right)}{30+9}=\frac{3.11}{39}=\frac{33}{39}=\frac{11}{13}\)

\(\frac{6.9-2.17}{63.3-11}=\frac{54-54}{63.3-11}=0\)

77/91 Tick nhha

77/91

Tính máy tính nhé bạn

A = \(\frac{3.4+3.7}{6.5+9}\)

A = \(\frac{3.\left(4+7\right)}{3.\left(10+3\right)}\)

A = \(\frac{11}{13}\)

B = \(\frac{6.9-2.17}{63.3-119}\)

B = \(\frac{2.\left(27-17\right)}{7.\left(27-17\right)}\)

B = \(\frac27\) = \(\frac{26}{91}\)

A = \(\frac{11}{13}\) = \(\frac{77}{91}\)

a: 27/-180=-27/180=-3/20=-21/140

-6/-35=6/35=24/120

-3/-28=3/28=15/140

b: \(\dfrac{3\cdot4+3\cdot7}{6\cdot5+9}=\dfrac{3\left(4+7\right)}{30+9}=\dfrac{11}{13}=\dfrac{2849}{13\cdot259}\)

\(\dfrac{6\cdot9-2\cdot17}{63\cdot6-119}=\dfrac{54-34}{259}=\dfrac{20}{259}=\dfrac{260}{259\cdot13}\)