Question

ayuda en matemáticas​

Answer 1

Respuesta:

a) 5/6 + 7/9 + 4/3

(45+42)/54 + 4/3

87/54 + 4/3

(261+216)/162

477/162

159/54

a = 53/18

b)5/6 + 7/9 - 1/3

(45+42)/54 - 1/3

87/54 - 1/3

(261 - 54)/162

207/162

69/54

b = 23/18

c) 2/3 + 11/15 - 1/5

(30+33)/45 - 1/5

63/45 - 1/5

(315-45)/225

270/225

90/75

30/25

c = 6/5

d) 8/12 + 2/5 - 1/2 - 1/10

(40+24)/60 - (10+2)/20

64/60 - 12/20

8/15 - 3/5

(40-45)/75

-25/75

d = - 1/3

2. Calcula

a) 2/3 x 15/14

30/42

a = 5/7

b) 4/3 ÷ 7/11

4/3 x 11/7

b = 44/21

c) 6 x 5/4

30/4

c = 15/2

d) 4/3 ÷ 6

4/3 x 1/6

4/18

d = 2/9

3. Calcula:

a) 6/7 x ( 9/4 + 3/8)

6/7 x (72+12)/32

6/7 x 84/32

6/7 x 42/16

6/7 x 21/8

3/1 x 3/4

a = 9/4

b) (8 + 2/5) ÷ (6 - 9/4)

[(40+2)/5] ÷ [(24-9)/4]

42/5 ÷ 15/4

42/5 x 4/15

168/75

b = 56/25

c) 7/9 ÷ 4/3 + 8/12 x 2/5

7/9 x 3/4 + 8/12 x 2/5

21/36 + 16/60

7/12 + 4/15

(105+48)/180

153/180

c = 17/20

d) 8/12 + 2/5 ÷ 6/7

8/12 + 2/5 x 7/6

8/12 + 14/30

2/3 + 7/15

(30+21)/45

51/45

d = 17/15

e) 5/6 + 7/9 x 4/3 - 1/2

(10 - 6)/12 + 28/27

4/12 + 28/27

1/3 + 28/27

(27 + 84)/27

111/27

e = 37/9

f) 5/6 + 7/9(4/3 - 1/2)

5/6 + 7/9[(8-3)/6]

5/6 + 7/9(5/6)

5/6 + 35/54

(270 + 210)/324

480/324

120/81

f = 40/27