Question

va rog rpd 100 puncte
ex 8​

Answer 1

Răspuns:

Explicație pas cu pas:

9/18 + 23/18 - 30/18 =

= (9 + 23 - 30)/18

= 2/18 = 1/9

⁶⁾2/3 + 5/18 + ²⁾7/9 =

= (12 + 5 + 14)/18

= 31/18

3  4/6 - 2  1/3 =

= 22/6 - ²⁾7/3

= (22 - 14)/6

= 8/6 = 4/3 = 1  1/3

3/5(1/9 + 4/9) =

= 3/5(5/9) = 3/9 = 1/3

3  4/5 : 1  2/17 =

= 19/5 : 19/17 = 19/5 × 17/19 = 17/5 = 3  2/5

(5/7)⁷(5/7)¹⁴ : (5/7)¹⁹ =

= (5/7)⁷⁺¹⁴ : (5/7)¹⁹

= (5/7)²¹ : (5/7)¹⁹

= (5/7)²¹⁻¹⁹

= (5/7)²

= 25/49

Answer 2

Răspuns:

a) =(2/18)⁽²=1/9

b) ⁶⁾2/3+5/18+²⁾7/9=12/18+5/18+14/18=31/18

c) (3·6+4)/6-(2·3+1)/3=22/6-²⁾7/3=22/6-14/6=(8/6)⁽²=4/3

d) 3/5·5/9=(15/45)⁽¹⁵=1/3

e) (3·5+4)/5:(1·17+2)/17=19/5:19/17=19/5·17/19=17/5

f) =(5/7)⁷⁺¹⁴⁻¹⁹=(5/7)²=5²/7²=25/49