1. sederhanakan 1 1/2 lusin : 2/5 kodi= 2.sederhanakan 1/4 kg : 20 gram= 3. sederhanakan 3/4 : 1/5 = tolong bantu

ket
1 lusin = 12 buku
1 kodi = 20 buku

1.
[tex]1 \frac{1}{12} = \frac{3}{2} \times 12 = 18[/tex]

2/5×20=8
18÷8=2,22

2. 1/4 =0,25 kg=250 g
250÷20=12,5 g

3. 3/4÷1/5=3/4×5/1=15/4=3,75

1½ lusin : 2/5 kodi
= 3/2.12 : 2/5.20
= 18 : 8
= 2¼ buah

¼kg : 20gram
= ¼.1000 : 20
= 250 : 20
= 12,5 gram

¾ : 1/5
= ¾ × 5
= 15/4
= 3¾