Question

4)Calcule Simplificando O Calculo Quando Possível:

a)2/9+5/9

b)6/7+5/3

c)2/5+8/15

d)2/4+3/7

e)3/8+4/16

f)5/7+9/3​

Answer 1

a)2/9+5/9

= 7/9

b)6/7+5/3

= (3 . 6 + 7 . 5)/21

= (18 + 35) / 21

= 53/21

c)2/5+8/15

= (15 . 2 + 5 . 8)/75

= (30 + 40) / 75

= 70/75 simplifica por 5

= 14/15

d)2/4+3/7

= (2 . 7 + 4 . 3)/28

= (14 + 12)/28

= 26/28 simplifica por 2

= 13/14

e)3/8+4/16

= (3 . 16 + 8 . 4)/128

= (48 + 32)/128

= 80/128 simplifica por 16

= 5/8

f)5/7+9/3​

= (5 . 3 + 7 . 9)/21

= (15 + 63)/21

= 78/21 simplifica por 3

= 26/7