Zadanie 1
a) 12/100 * 35/1 = 84/20 = 4 4/20 = 4 1/5 = 4,2
b) 4,5 * 400 : 100 = 1800 : 100 = 18
c) 0,85 * 2500 : 100 = 2125 : 100 = 21,25
Zadanie 2
a)
325x% = 6,5
3,25x = 6,5 | : 3,25
x = 2
b)
0,2x = 10
0,002x = 10 | : 0,002
x = 5000
c)
47,5x = 152
0,475x = 152 | : 0,475
x = 320