Question

Efectuati respectand ordinea operatiilor:
1 supra 2 ori 5 - 1 supra 10 ori 2 : 4 supra 5
(1 supra 2 ) la 2 ori 5 + 3 ori 0,5
 1 supra 2 + 2 supra 3 : (2 supra 3) la 2 Ajutatima repedee va rog!

Answer 1

1/2 × 5 - 1/10 × 2 : 4/5 =

= 5/2 - 2/10 × 5/4 =

= 5/2 - 10/40 =

= 5/2 - 1/4 =

= (2×5 - 1)/4 =

= 9/4

(1/2)^2 × 5 + 3 × 0,5 =

= 1/4 × 5 + 1,5 =

= 5/4 + 15/10 =

= 5/4 + 3/2 =

= (5 + 2×3)/4 =

= 11/4


1/2 + 2/3 : (2/3)^2 =

= 1/2 + 2/3 : 4/9 =

= 1/2 + 2/3 × 9/4 =

= 1/2 + 3/2 =

= 4/2 =

= 2