1- Faça as operações:
a) 1/2+3/2
b) 4/3+5/3
c) 5/6+2/6=
d) 1/2+1/3=
e) 1/2+1/4=
f) 1/3+1/4=
g) 3/4-2/3=
h) 2/5-1/3=
i) 6/4-1/7+1/2=
j) 2/9+1/8-1/2=
k) 1/2+3=
Soluções para a tarefa
Resposta:
)
2
1
+
2
3
=
2
4
=2
b) \frac{4}{3} + \frac{5}{3} = \frac{9}{3} = 3b)
3
4
+
3
5
=
3
9
=3
c) \frac{5}{6} + \frac{2}{6} = \frac{7}{6} = 1 \frac{1}{6}c)
6
5
+
6
2
=
6
7
=1
6
1
d) \frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}d)
2
1
+
3
1
=
6
3
+
6
2
=
6
5
e) \frac{1}{2} + \frac{1}{4} = \frac{2}{4} + \frac{1}{4} = \frac{3}{4}e)
2
1
+
4
1
=
4
2
+
4
1
=
4
3
f) \frac{1}{3} + \frac{1}{4} = \frac{4}{12} + \frac{3}{12} = \frac{7}{12}f)
3
1
+
4
1
=
12
4
+
12
3
=
12
7
g) \frac{3}{4} - \frac{2}{3} = \frac{9}{12} - \frac{8}{12} = \frac{1}{12}g)
4
3
−
3
2
=
12
9
−
12
8
=
12
1
h) \frac{2}{5} - \frac{1}{3} = \frac{6}{15} - \frac{5}{15} = \frac{1}{15}h)
5
2
−
3
1
=
15
6
−
15
5
=
15
1
i) \frac{6}{4} - \frac{1}{7} + \frac{1}{2} = \frac{42}{28} - \frac{4}{28} + \frac{14}{28} = \frac{52}{28} = 1 \frac{24}{28} = 1 \frac{6}{7}i)
4
6
−
7
1
+
2
1
=
28
42
−
28
4
+
28
14
=
28
52
=1
28
24
=1
7
6
j) \frac{2}{9} + \frac{1}{8} - \frac{1}{6} = \frac{16}{72} + \frac{9}{72} - \frac{12}{72} = \frac{13}{72}j)
9
2
+
8
1
−
6
1
=
72
16
+
72
9
−
72
12
=
72
13
k) \frac{1}{2} + \frac{3}{1} = \frac{1}{2} + \frac{6}{2} = \frac{7}{2} = 3 \frac{1}{2}k)
2
1
+
1
3
=
2
1
+
2
6
=
2
7
=3
2
1