yg mau bantuin makasih banyak

3.
[tex] \frac{3}{4} + 1 \frac{1}{2} + 1 \frac{1}{2} = \frac{3 + 2 + 2}{4} = 2 \frac{7}{4} = 3 \frac{3}{4} [/tex]
4.
[tex]1.8 = 1 \frac{8}{10} = \frac{18}{10} = \frac{9}{5} - \frac{1}{6} = \frac{54 - 5}{30} = \frac{49}{3} = \frac{49}{3} \div 3 = \frac{49}{3} \times \frac{1}{3} = \frac{49}{9} = 5 \frac{4}{9} [/tex]
5.
2,5/100×1200000=30000
1/5×1200000=240000
240000+30000=270000