Question

15 puncte URGENT 2 prob la mate clasa a 6-a​

Answer 1

Răspuns:

Explicație pas cu pas:

18a)

1 + 1/3 = 4/3

1/(4/3) = 3/4

1 + 3/4 = 7/4

1 / (7/4) = 4/7

100 - 4/7 = 700/7 - 4/7 = 696/7

____________

18b)

1 + 1/2 = 3/2

1/(3/2) = 2/3

1 + 2/3 = 5/3

1/(5/3) = 3/5 = 0,6

100 - 0,6 = 99,4

________________________

19.

(a + b)/2 = 26/5

a + b = 52/5

a = b*35/17

35b/17 + b = 52/5

35b/17 + 17b/17 = 52/5

52b/17 = 52/5

b = 52/5 *17/52 = 17/5

a = 52/5 - 17/5 = 35/5 = 7