1) 6,25 * 1/5 + 1/4 : 0,64 = 625/100 * 1/5 + 1/4 : 64/100 = 625*1/100*5 +
1*100/4*64 = 625/500 + 100/256 = 5/4 + 25/64 = 5*16 + 25 /64=
80+25/64 = 105/64 = 1 41/64
2) 1 3/5 * 0,5 + 0,16 * 1 1/4 = 8/5 * 1/2 + 16/100 * 5/4 = 8/10 +
16*5/100*4 = 8/10 + 2/10 = 8+2/10 = 10/10 = 1