Răspuns:
a) 2; b) 48; c) 35
Explicație pas cu pas:
14.a)
[tex]\Big( \frac{17 + 83}{100}\Big) + \Big(\frac{1}{10} + \frac{9}{10} \Big) = \frac{100}{100} + \Big(\frac{1 + 9}{10}\Big) = \frac{100}{100} + \frac{10}{10} = 1 + 1 = \bf 2[/tex]
b)
[tex]\Big(5 \frac{1}{7} + 3\frac{5}{7} + \frac{1}{7} \Big) + \Big(12 \frac{5}{11} + 10 \frac{6}{11} \Big) + \Big(4 \frac{4}{9} + 11 \frac{5}{9} \Big) = 8\frac{1 + 5 + 1}{7} + 22 \frac{5 + 6}{11} + 15\frac{4 + 5}{9} = 8\frac{7}{7} + 22 \frac{11}{11} + 15\frac{9}{9} = 9 + 23 + 16 = \bf 48[/tex]
c)
[tex]\Big(11 \frac{9}{15} + 8 \frac{^{3)} 2}{5} \Big) + \Big(4 \frac{^{2)}4}{13} + 10 \frac{5}{26} + \frac{^{13)}1}{2} \Big) = \Big(11 \frac{9}{15} + 8 \frac{6}{15} \Big) + \Big(4 \frac{8}{26} + 10 \frac{5}{26} + \frac{13}{26} \Big) = 19 \frac{9 + 6}{15} + 14 \frac{8 + 5 + 13}{26} = 19 \frac{15}{15} + 14 \frac{26}{26} = 20 + 15 = \bf 35[/tex]
