No 12 jawaban nya adalah pakai cara

= 1 1/2 kg - 1 1/4 kg
= 3/2 - 5/4
= 6/4 - 5/4
= 1/4

0.5 = 1/2

= 1/4 + 1/2
= 1/4 + 2/4
= 3/4

3.4 = C. 0.75