Răspuns :
a. 100-20/100·50[lei]
⇒80/100·50[lei]
⇒80·50/100[lei]
⇒80·5/10[lei]
⇒80/2[lei]⇒40lei;
b. 100+15/100·50[lei]
,115/100·50[lei]
⇒115·50/100[lei]
⇒115·5/10[lei]
⇒115/2[lei]⇒57,5lei;
⇒80/100·50[lei]
⇒80·50/100[lei]
⇒80·5/10[lei]
⇒80/2[lei]⇒40lei;
b. 100+15/100·50[lei]
,115/100·50[lei]
⇒115·50/100[lei]
⇒115·5/10[lei]
⇒115/2[lei]⇒57,5lei;
100-20/100x50
80/100x50
80x50/100
80x5/10
80/2=40lei
100+15/100x50
115/100x50
115x50/100
115x5/10
115/2=57,5
80/100x50
80x50/100
80x5/10
80/2=40lei
100+15/100x50
115/100x50
115x50/100
115x5/10
115/2=57,5