help me please gaiss..

10 cangkir @ 1/4 kg = 10 x 1/4 = 10/4 = 2,5 kg
ibu memberi 3 1/4 kg =13/4 kg
 jumlah beras dimasak = 10/4 +13/4 = 23/4 = 5 3/4 kg

bambu = 4,5 m
   1/2 = angklung =1/2 x 4,5 m = 2,25 m

 5/4 dari 1/2 =erik = 1/2:  5/4  = 1/2 x 4/5 = 4/10

sisa = 1/2-4/10
        = 5/10-4/10
        =1/10
        = 1/10 x 2,25 m
        =0,225 m

semoga bantu yaaa