Question

Calcule a média aritmética dos seguintes números: a) 7 e 15: b) 10,2 e 9: c) 4, 7, 15, 9, 10: d) 42, 18, 56 e 34: e) 14 e 12 : f) 2/3 e 4/5 :​

Answer 1

Resposta:

a) m = (7 + 15)/2 = 22/2 = 11

b) m = (10 + 2 + 9)/3 = 21/3 = 7

c) m = (4 + 7 + 15 + 9 + 10)/5 = 45/5 = 9

d) m = (42 + 18 + 56 + 34)/4 = 150/4 = 37,5

e) m = (14 + 12)/2 = 26/2 = 13

f) m = (2/3 + 4/5)/2 = (10/15 + 12/15)/2 = 22/30 = 11/15

Answer 2

Resposta:

Explicação passo a passo:

Calcule a média aritmética dos seguintes números:

a) 7 e 15:

= (7+15)/2

= 22/2

= 11

__________________

b) 10,2 e 9:

= (10+2+9)/3

= (12+9)/3

= 21/3

= 7

___________________

c) 4, 7, 15, 9, 10:

= (4+7+15+9+10)/5

= (11+24+10)/5

= (35+10)/5

= 45/5

= 9

_________________

d) 42, 18, 56 e 34:

= (42+18+56+34)/4

= (60+90)/4

= 150/4 (:2)/(:2)

= 75/2

= 37,5

_____________

e) 14 e 12 :

= (14+12)/2

= 26/2

= 13

______________

f) 2/3 e 4/5 :​

= (2/3 + 4/5) : 2

= [(5.2 + 3.4)/15] . 1/2

= [(10+12)/15] . 1/2

= 22/15 . 1/2

= 22/2 . 1/15

= 11/15

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