19/10=1.9

14/28 : 7/18 x 6/5 + 3/10

= 9/7 x 6/5 + 3/10

= 54/35 + 3 / 10

=108/70 + 21/70

= 129/70

Tk mk nha

\(\frac{14}{27}:\frac{7}{18}x\frac{6}{5}+\frac{3}{10}=\frac{4}{3}x\frac{6}{5}+\frac{3}{10}=\frac{8}{5}+\frac{3}{10}=\frac{19}{10}\)

=4/3x6/5+3/10

=8/5+3/10

=19/10

19/10

\(\frac{14}{27}:\frac{7}{18}\cdot\frac{6}{5}+\frac{3}{10}\)

\(=\frac{14}{27}\cdot\frac{18}{7}\cdot\frac{6}{5}+\frac{3}{10}\)

\(=\frac{14\cdot18\cdot6}{27\cdot7\cdot5}+\frac{3}{10}\)

\(=\frac{2\cdot7\cdot9\cdot2\cdot3\cdot2}{3\cdot9\cdot7\cdot5}+\frac{3}{10}\)

\(=\frac{8}{5}+\frac{3}{10}\)

\(=\frac{16}{10}+\frac{3}{10}\)

\(=\frac{19}{10}\)

bằng 19/10 nha bạn

chú ý:

/ là phân số

\(=\frac{19}{10}\)

= 4/3 x 6/5 + 3/10

= 8/5 +3/10

= 19/10

cám ơn nha

k mik nha

a) 2^7 . 9^3 / 6^5 . 8^2

= 2^7 . 3^9 / 2^5 . 3^5 . 2^6

= 2^-4 . 3^4

43/30

138/35

104/35

62/45

mk nha

thanks

bạn viet ro phep tinh rra ho minh

\(\frac{1}{2}+\frac{3}{5}+\frac{2}{6}=\frac{11}{10}+\frac{2}{6}=\frac{43}{30}\)

\(\frac{7}{5}+\frac{1}{7}+\frac{14}{10}+1=\frac{54}{35}+\frac{14}{10}+1=\frac{129}{35}\)

104/35

62/45

1+2+3+4+5+6+7+8+9+10=55

11+12+13+14+15+16+17+18+19+20=155

1+2+3+4+5+6+7+8+9+10+11+12+13+14 +15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30-50-53=362

1+2+3+4+5+6+7+8+9+10=55

11+12+13+14+15+16+17+18+19+20=155

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30-50-53=362