1. 5/12 + 4/12 = 9/12 =3/4
2. 1- 3/4 = 1/4
3. 5.4 на 4 =21.6
4. 21.6 на 5/12 = 9 см
5. 21.6 на 4/12 =7.2 см
1. 5/12 + 4/12 = 9/12 =3/4
2. 1- 3/4 = 1/4
3. 5.4 на 4 =21.6
4. 21.6 на 5/12 = 9 см
5. 21.6 на 4/12 =7.2 см