Jawaban:
[tex]1)0,78 + \frac{3}{4} - 3 \frac{5}{8} \\ = \frac{78}{100} + \frac{3}{4} - \frac{29}{8} \\ = \frac{156}{200} + \frac{150}{200} - \frac{725}{200} \\ = \frac{306}{200} - \frac{725}{200} \\ = - \frac{419}{200} \\ = - 2 \frac{19}{200} [/tex]
[tex]2)75\% - 0,4 + 29 \\ = \frac{75}{100} - \frac{4}{10} + \frac{29}{1} \\ = \frac{75}{100} - \frac{40}{100} + \frac{2.900}{100} \\ = \frac{35}{100} + \frac{2.900}{100} \\ = \frac{2.935}{100} \\ = \frac{587}{20} \\ = 29 \frac{7}{20} [/tex]
[tex]3)88 - 3,45 + 28\% \\ = \frac{88}{1} - \frac{345}{100} + \frac{28}{100} \\ = \frac{8.800}{100} - \frac{345}{100} + \frac{28}{100} \\ = \frac{8.455}{100} + \frac{28}{100} \\ = \frac{8.483}{100} \\ = 84 \frac{83}{100} [/tex]
[tex]4)8 \frac{1}{4} - 3,8 + (80\% - \frac{1}{2}) \\ = \frac{33}{4} - \frac{38}{10} + ( \frac{80}{100} - \frac{1}{2} ) \\ = \frac{165}{20} - \frac{76}{20} + ( \frac{80}{100} - \frac{50}{100} ) \\ = \frac{89}{20} + \frac{30}{100} \\ = \frac{445}{100} + \frac{30}{100} \\ = \frac{475}{100} \\ = \frac{19}{4} \\ = 4 \frac{3}{4} [/tex]
[tex]5)5 \frac{3}{10} - (3,4 - 10\%) + 159 \\ = \frac{53}{10} - ( \frac{34}{10} - \frac{10}{100}) + \frac{159}{1} \\ = \frac{53}{10} - ( \frac{340}{100} - \frac{10}{100}) + \frac{159}{1} \\ = \frac{53}{10} - \frac{330}{100} + \frac{159}{1} \\ = \frac{530}{100} - \frac{330}{100} + \frac{15.900}{100} \\ = \frac{200}{100} + \frac{15.900}{100} \\ = \frac{16.100}{100} \\ = \frac{161}{1} \\ = 161[/tex]
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