a) \(\frac{5}{12}-\frac{3}{-16}+\frac{3}{4}\)

\(=\frac{5}{12}-\left(-\frac{3}{16}\right)+\frac{3}{4}\)

\(=\frac{5}{12}+\frac{3}{6}+\frac{3}{4}\)

\(=\frac{20+9+36}{48}\)

\(=\frac{65}{48}\)

Mấy câu kia lát làm :))

b) \(\frac{17}{-34}+\frac{25}{75}+\frac{121}{132}\)

\(=-\frac{1}{2}+\frac{1}{3}+\frac{121}{123}\)

\(=-\frac{123}{246}+\frac{82}{246}+\frac{242}{246}\)

\(=\frac{-123+82+242}{246}\)

\(=\frac{201}{246}=\frac{67}{82}\)

c) \(-\frac{7}{21}+\left(1+\frac{1}{3}\right)\)

\(=-\frac{7}{21}+1+\frac{1}{3}\)

\(=-\frac{1}{3}+1+\frac{1}{3}\)

= 0 + 1

= 1

giải cho mình đi

giải cho mình

b;\(\frac{x}{17}=\frac{60}{204}\)

=> \(x=60.17:204=5\)

c; \(6+\frac{x}{33}=\frac{7}{11}\)

=> \(6=\frac{7}{11}-\frac{x}{33}\)

=> \(6=\frac{21}{33}-\frac{x}{33}\)

=> \(6=\frac{21-x}{33}\)

=> \(21-x=198\)

=> \(x=21-198\)

=> \(x=-117\)

bạn viết chữ mà frac

\(a,\dfrac{9}{17}+\dfrac{15}{4}=\dfrac{36}{68}+\dfrac{255}{68}=\dfrac{291}{68}\\ b,\dfrac{19}{121}-\dfrac{1}{11}=\dfrac{19}{121}-\dfrac{11}{121}=\dfrac{8}{121}\\ c,\dfrac{4}{15}+3=\dfrac{4}{15}+\dfrac{45}{15}=\dfrac{49}{15}\\ d,3-\dfrac{5}{9}=\dfrac{27}{9}-\dfrac{5}{9}=\dfrac{22}{9}\)

\(a,\dfrac{9}{17}+\dfrac{15}{4}=\dfrac{36}{68}+\dfrac{255}{68}=\dfrac{291}{68}\)

\(b,\dfrac{19}{121}-\dfrac{1}{11}=\dfrac{19}{121}-\dfrac{11}{121}=\dfrac{8}{121}\)

\(c,\dfrac{4}{15}+3=\dfrac{4}{15}+\dfrac{3}{1}=\dfrac{4}{15}+\dfrac{45}{15}=\dfrac{49}{15}\)

\(d,3-\dfrac{5}{9}=\dfrac{3}{1}-\dfrac{5}{9}=\dfrac{27}{9}-\dfrac{5}{9}=\dfrac{22}{9}\)

`A) 9/17 + 15/4 = 36/68 + 255/68 = 291/68 `

` B) 19/121 - 1/11= 19/121 - 11/121 = 8/121 ` 

` C) 4/15 + 3 = 4/15 + 45/15 = 49/15 `

` D) 3 - 5/9 = 27/9 - 5/9 = 22/9 `

= 2873/ 2211

=2873/2211

=2873/2211

11 × 13 × 17 + 165 - 121

=  143   ×  17 + 165  - 121

=        2431     + 165 - 121

=                  2596      -  121

=                            2475