Pismeni zadaci

Zadatak 0015

Test: MPo5BGIII_002

 

Izračunaj vrednosti izraza: a) \(5\frac{5}{8}+4\frac{3}{4}\); b) \( 4\frac{4}{15}-2\frac{2}{5}\); c)  \(4\frac{7}{12}-\left (2\frac{4}{5}-1\frac{3}{10} \right )\).

 

Rešenje: a)  \( ... =5\frac{5}{8}+4\frac{3\cdot 2}{4\cdot 2}\) \(= 5\frac{5}{8}+4\frac{6}{8}\)\(=9\frac{11}{8}=10\frac{3}{8}\);

 

b) \( ... =4\frac{4}{15}-2\frac{2\cdot 3}{5\cdot 3}\) \(= 3\frac{19}{15}-2\frac{6}{15}\)\(=1\frac{13}{15}\);

 

c)\( ... =4\frac{7}{12}-\left (2\frac{4\cdot 2}{5\cdot 2}-1\frac{3}{10} \right )\) \( = 4\frac{7}{12}-1\frac{5:5}{10:5}\) \( = 4\frac{7} {12}-1\frac{1}{2}\) \( = 4\frac{7}{12}-1\frac{1\cdot 6}{2\cdot 6}\) \( = 3\frac{1}{12}\).

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