Question

Exercitiile incercuite!!VA ROG MULT!!URGENT

Answer 1

18 . scumpire  1,2 + 1,2 ·40/100=1,2 + 1,2·2/5=1,2( 1+2/5)= 1,2 ·7/5=1,68lei
19 . 15lei .................10 agende ..............150lei
reducere    150 - 10%·150= 150 -  15=135 
o agenda costa 135: 10 = 13,5 lei
20. dobinda = suma ·p% ·numarul de ani = 3.000000· 16/100 · 1=480000
suma totala = 3000000 + 480000= 3480000lei
22. 8% dinx = 32      8x  /   100    =32                    x=400
24.x .....................100 %
     6lei.....................5%                    5·x=6·100           x=120
ieftinit 120 -6 =114 lei