1) Resolva as adições:
a) (−
1
3
) + (−
1
5
)=
b) (−
1
8
) + (+
5
4
)=
c) (+
1
5
) + (+
3
5
)=
d) (−
1
2
) + (−
4
10) + (+
1
5
) =
e) (−
3
5
) + (+2) + (−
1
3
)=
2) Resolva as subtrações:
a) (−
1
2
) − (+
5
8
)=
b) (+
2
3
) − (+
1
5
)=
c) (−
2
5
) − (+
1
2
)=
d) (+
1
2
) − (+5) =
e) (+
5
7
) − (−
1
2
)=
3) Resolva as multiplicações:
a) (+
2
3
) . (−
1
3
)=
b) (−
5
8
) . (−
4
3
)=
c) (+
4
5
) . (−
1
3
)=
d) (−
5
2
) . (−
2
7
) . (+
1
5
) =
e) (−
3
5
) . (+
2
7
) . (−
2
3
)=
4) Resolva as adições:
a) (+
1
9
) : (−
7
5
)=
b) (+
1
2
) : (−
3
4
)=
c) (−
3
4
) : (−
3
4
)=
d) (−
7
5
) : (+
1
2
) =
e) (−
5
2
) : (+2)=