Odpowiedź:
13. b)
[tex] \frac{2}{3} + 1 \frac{3}{4} + 3 \frac{5}{6} = \frac{8}{12} + 1 \frac{9}{12} + 3 \frac{10}{12} = \\ = 4 \frac{27}{12} = 6 \frac{3}{12} = 6 \frac{1}{4} [/tex]
c)
[tex]5.64 + 6 \frac{9}{25} = 5 \frac{64}{100} + 6 \frac{36}{100} = 11 \frac{100}{100} = 12[/tex]
d)
[tex]0.15 + 7 \frac{5}{8} = 0.15 + 7.625 = 7.775[/tex]
e)
[tex]0.8 + 1.02 + \frac{9}{50} = 0.8 + 1.02 + 0.18 = 2[/tex]
f)
[tex]4.125 + 5 \frac{7}{8} = 4 \frac{1}{8} + 5 \frac{7}{8} = 10[/tex]
g)
[tex]10 \frac{1}{2} + 2.875 = 10 \frac{4}{8} + 2 \frac{7}{8} = 13 \frac{1}{8} [/tex]
h)
[tex]2.4 + 0.05 + 14.9 = 17.35[/tex]
i)
[tex]4.56 + 7 \frac{3}{4 } = 4.56 + 7.75 = 12.26[/tex]
14.
a)
[tex] \frac{4}{9} + \frac{5}{12} = \frac{16}{36} + \frac{15}{36} = \frac{31}{36} [/tex]
b)
[tex] \frac{6}{7} + \frac{10}{12} = \frac{72}{84} + \frac{70}{84} = 1 \frac{58}{84} = 1 \frac{29}{41} [/tex]
c)
[tex]0.75 + \frac{4}{5} = \frac{3}{4} + \frac{4}{5} = \frac{15}{20} + \frac{16}{20} = 1 \frac{11}{20} [/tex]
d)
[tex]1 \frac{7}{8} + 4.75 = 1.875 + 4.750 = 6.625[/tex]
e)
[tex]5.2 + \frac{5}{6} =5 \frac{1}{5} + \frac{5}{6} = 5 \frac{6}{30} + \frac{25}{30} = 6 \frac{1}{30} [/tex]
f)
[tex]1.75 + 2\frac{6}{9} + \frac{1}{12} = 1 \frac{3}{4} + 2 \frac{6}{9} + \frac{1}{12} = \\ = 1 \frac{27}{36} + 2 \frac{24}{36} + \frac{3}{36} = 4 \frac{18}{36} = 4 \frac{1}{2} [/tex]
g)
[tex]2 \frac{5}{6} + 3 \frac{2}{3} + 1 \frac{5}{12} = 2 \frac{10}{12} + 3 \frac{8}{12} + 1 \frac{5}{12} =7 \frac{11}{12} [/tex]
h)
[tex]1.5 + 2 \frac{1}{3} + 3 \frac{1}{5} = 1 \frac{1}{2} + 2 \frac{1}{3} + 3 \frac{1}{5} = \\ = 1 \frac{15}{30} + 2 \frac{10}{30} + 3 \frac{6}{30} = 7 \frac{1}{30} [/tex]
i)
[tex]3 \frac{2}{3} + 4 \frac{1}{6} + 5.625 = 3\frac{2}{3} + 4 \frac{1}{6} + 5 \frac{5}{8} = 3 \frac{16}{24} + 4 \frac{4}{24} + 5 \frac{15}{24} = 13 \frac{11}{24} [/tex]
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