a)
[tex]4 \frac{2}{7} + 2 \frac{3}{8} = 4 \frac{16}{56} + 2 \frac{21}{56} = 6 \frac{37}{56} [/tex]
b)
0,7+2,6=3,4
c)
[tex]7 \frac{1}{6} - 2 \frac{3}{4} = 7 \frac{2}{12} - 2 \frac{9}{12} = 4 \frac{5}{12} [/tex]
d)
9,2-4,7=4,5
e)
[tex]3 \frac{2}{3} \times 2 \frac{1}{4} = \frac{11}{3} \times \frac{9}{4} = \frac{33}{4} = 8 \frac{1}{4} [/tex]
f)
0,3×1,2=0,36
g)
[tex]5 \frac{1}{5} \div 1 \frac{6}{7} = \frac{26}{5} \times \frac{7}{13} = \frac{14}{5} = 2 \frac{4}{5} [/tex]
zad 2
[tex]1 \frac{1}{2} (0.3 + \frac{3}{5} \div 3) - \frac{3}{20} = \frac{3}{2} \times \frac{1}{2} - \frac{3}{20} = \frac{3}{4} - \frac{3}{20} = \frac{12}{20} [/tex]
zad 3
[tex](0.5 + 3\frac{1}{3} )(7 \frac{1}{5} - 5.7) = (\frac{5}{10} + \frac{10}{3} )( \frac{36}{5} - \frac{57}{10} ) = ( \frac{15}{30} + \frac{100}{30} )( \frac{72}{10} - \frac{57}{10} ) = \frac{115}{30} \times \frac{15}{10} = \frac{115}{20} = 5 \frac{15}{20} = 5 \frac{3}{4} [/tex]
