Question

Ajutați-mă vă rog la exercițiul 5, dau coroană

Answer 1

Răspuns:

Explicație pas cu pas:

a)

/2 - 1,(3)/ - /0,25/ = /2 - 12/9/ - 0,25 = /18/9 - 12/9/ - 0,25 = 6/9 - 25/100 = 2/3 - 1/4 = 8/12 - 3/12 = 5/12

b)

/0,(2) - 1/ - /1,25/ = /2/9 - 9/9/ - 1,25 = /-7/9/ - 125/100 = 7/9 - 5/4 = 28/36 - 45/36 = -17/36

c)

/-0,5/ - /0,(6) - 2/ = 0,5 - /6/9 - 18/9/ = 0,5 - /-12/9/ = 5/10 - 12/9 = 1/2 - 4/3 = 3/6 - 8/6 = -5/6

d)

/0,8(3) - 1/ - /-1,25/ = /(83-8)/90 - 1/ - 1,25 = /75/90 - 90/90/ - 1,25 =

15/90 - 125/100 = 1/6 - 5/4 = 2/12 - 15/12 = -13/12

e)

/0,2(6) - 1/ - /-0,36/ = /24/90 - 90/90/ - 36/100 = 66/90 - 36/100 = 11/15 - 9/25 = 55/75 - 27/75 = 28/75

f)

/-0,75/ - /1 - 0,2(7)/ = 0,75 - /1 - 25/90/ = 75/100 - /90/90 - 25/90/ = 3/4 - 65/90 = 3/4 - 13/18 = 27/36 - 26/36 = 1/36