Respuestas
Respuesta:
6
Explicación paso a paso:
Explicación paso a paso:
Para adicionar o sustraer números mixtos, escribo cada uno como fracción y luego opero normalmente:
1) 4\frac{1}{2} +6 \frac{1}{5}=\frac{9}{2} + \frac{31}{5}=\frac{(9)(5) + (31)(2) }{10} =\frac{45+62}{10} =\frac{107}{10}4
2
1
+6
5
1
=
2
9
+
5
31
=
10
(9)(5)+(31)(2)
=
10
45+62
=
10
107
2) 2\frac{5}{10} +5 \frac{3}{5}=\frac{25}{10} + \frac{28}{5}=\frac{(25)(1) + (28)(2) }{10} =\frac{25+56}{10} =\frac{81}{10}2
10
5
+5
5
3
=
10
25
+
5
28
=
10
(25)(1)+(28)(2)
=
10
25+56
=
10
81
3) 3\frac{4}{5} +8 \frac{1}{3}=\frac{19}{5} + \frac{25}{3}=\frac{(19)(3) + (25)(5) }{15} =\frac{57+125}{15} =\frac{182}{15}3
5
4
+8
3
1
=
5
19
+
3
25
=
15
(19)(3)+(25)(5)
=
15
57+125
=
15
182
4) 2\frac{4}{5} +8 \frac{3}{4}=\frac{14}{5} + \frac{35}{4}=\frac{(14)(4) + (35)(5) }{20} =\frac{56+175}{20} =\frac{231}{20}2
5
4
+8
4
3
=
5
14
+
4
35
=
20
(14)(4)+(35)(5)
=
20
56+175
=
20
231
5) 3\frac{2}{3} +5 \frac{1}{4}=\frac{11}{3} + \frac{21}{4}=\frac{(11)(4) + (21)(3) }{12} =\frac{44+63}{12} =\frac{107}{12}3
3
2
+5
4
1
=
3
11
+
4
21
=
12
(11)(4)+(21)(3)
=
12
44+63
=
12
107
6) 6\frac{4}{10} +5 \frac{3}{4}=\frac{64}{10} + \frac{23}{4}=\frac{(64)(2) + (23)(5) }{20} =\frac{128+115}{20} =\frac{243}{20}6
10
4
+5
4
3
=
10
64
+
4
23
=
20
(64)(2)+(23)(5)
=
20
128+115
=
20
243
7) 2\frac{1}{4} +7 \frac{2}{10}=\frac{9}{4} + \frac{72}{10}=\frac{(9)(5) + (72)(2) }{20} =\frac{45+144}{20} =\frac{189}{20}2
4
1
+7
10
2
=
4
9
+
10
72
=
20
(9)(5)+(72)(2)
=
20
45+144
=
20
189
8) 6\frac{1}{2} +4 \frac{4}{5}=\frac{13}{2} + \frac{24}{5}=\frac{(13)(5) + (24)(2) }{10} =\frac{65+48}{10} =\frac{113}{10}6
2
1
+4
5
4
=
2
13
+
5
24
=
10
(13)(5)+(24)(2)
=
10
65+48
=
10
113
9) 2\frac{1}{2} +9 \frac{6}{10}=\frac{5}{2} + \frac{96}{10}=\frac{(5)(5) + (96)(1) }{10} =\frac{25+96}{10} =\frac{121}{10}2
2
1
+9
10
6
=
2
5
+
10
96
=
10
(5)(5)+(96)(1)
=
10
25+96
=
10
121
10) 5\frac{5}{10} +8 \frac{1}{2}=\frac{55}{10} + \frac{17}{2}=\frac{(55)(1) + (17)(5) }{10} =\frac{55+85}{10} =\frac{140}{10} =145
10
5
+8
2
1
=
10
55
+
2
17
=
10
(55)(1)+(17)(5)
=
10
55+85
=
10
140
=14
Respuesta:
eso se resume en
a(a+2)
Explicación paso a paso: