tolong jawab nomor 3dan 4

[tex]3)84 - ( - 3) + ( - 55) = 87 + ( - 55) = 32[/tex]
[tex](1.25 + \frac{7}{5} ) - 2 \frac{1}{2} = (\frac{125}{100} + \frac{7}{5} = \frac{125 + 140}{100} = \frac{265}{100} ) - \frac{5}{2} = \frac{265}{100} - \frac{5}{2} = \frac{265 -250 }{100} = \frac{15}{100} = \frac{3}{20} [/tex]