Respuestas
Explicación paso a paso:
\begin{gathered}1) \\ \frac{5}{2} + \frac{19}{7} = \frac{35 + 38}{14} = \frac{73}{14} \\ \\ 2) \\ \frac{7}{3} - \frac{4}{5} = \frac{35 - 12}{15} = \frac{23}{15} \\ \\ 3) \\ 13 - \frac{5}{3} = \frac{39 - 5}{3} = \frac{34}{3} \\ \\ 4) \\ 15 - \frac{1}{5} = \frac{75 - 1}{5} = \frac{74}{5} \end{gathered}
1)
2
5
+
7
19
=
14
35+38
=
14
73
2)
3
7
−
5
4
=
15
35−12
=
15
23
3)
13−
3
5
=
3
39−5
=
3
34
4)
15−
5
1
=
5
75−1
=
5
74
\begin{gathered}5) \\ \frac{7}{6} - \frac{1}{2} = \frac{7 - 3}{6} = \frac{4}{6} \: \: = \frac{2}{3} \\ \\ 6) \\ \frac{17}{3} - \frac{2}{9} = \frac{51 - 2}{9} = \frac{49}{9} \\ \\ 7) \\ \frac{23}{9} - \frac{4}{3} = \frac{23 - 12}{9} = \frac{11}{9} \\ \\ 8) \\ \frac{5}{6} - \frac{8}{3} = \frac{5 - 16}{6} = - \frac{11}{6} \end{gathered}
5)
6
7
−
2
1
=
6
7−3
=
6
4
=
3
2
6)
3
17
−
9
2
=
9
51−2
=
9
49
7)
9
23
−
3
4
=
9
23−12
=
9
11
8)
6
5
−
3
8
=
6
5−16
=−
6
11