Question

1)CALCULAȚI 4%DIN NUMERELE:1200,250,350
2) (10%DIN450)-(5%DIN 200)-(7%DIN 100)
3) (13%DIN4500)-(9%DIN 300)-(2%DIN 250)
4)DETERMINAȚI S STIIND CA:X/8 DIN 320 ESTE 1600.

Answer 1

4/100·1200=48
4/100·250=10
4/100·350=15

10/100·450=45
5/100·200=10  ⇒45-10-7=28
7/100·100=7

13/100·4500=585
9/100·300=27       ⇒585-27-5=553
2/100·250=5 

Answer 2

1)4%din 1200=4/100 x 1200=4 x 12=48
  4%din250=4/100 x 250=20/2=10
  4%din350=4/100 x 350=28/2=14
2)(10 x 450)/100-(5 x 200)/100-(7 x 100)/100=
   =45-10-7
   =28.
3)(13 x 4500)/100-(9 x 300)/100-(2 x 250)/100=
   =585-27-5
   =553.
4)320x/8=1600
   40x=1600
   x=1600/40
   x=40.