Question

1 kg wisni kosztuje 5,20 . ile kosztuje 2 i 3/4 kg wisni ?

Answer 1

5.20 + 5.20 = 10.40

5.20 : 4 = 1.3

1.3 x 3 = 3.90

10.40 + 3.90 = 14.30

Answer 2

5,20*2 = 10,40

3/4 z 5,20=3/4*5 20/100=3/4 *5 1/5=3/4*26/5=78/20=3 18/20=3 9/10=3,9=3,90

10,40+3,90=13,130=14zł30gr

pozdrawiam;)