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Vypočítajte:

A) 6/14 + 1/14 =

B) 1 2/5 + 2 1/5 =

C) 2/13 + 5/13 + 7/13 =

D) 2 1/10 + 0/10 =

E) 3 + 10/11 =

F) 2/3 + 4/3 = 7/5 + 6/5 =

G) 4 1/9 + 2 4/9 =

H) 8 3/8 + 3 1/8 + 1 7/8 =

I) 4/9 + 6 1/9 =

J) 11/6 + 2 1/6 =

K) 0 1/15 + 7/15 + 3 4/15 =

Správna odpoveď:

A =  1/2
B =  3 ³⁄₅ = 18/5
C =  1 ¹⁄₁₃ = 14/13
D =  2 ¹⁄₁₀ = 21/10
E =  3 ¹⁰⁄₁₁ = 43/11
F =  2
K =  3 ⁴⁄₅ = 19/5

Postup správneho riešenia:

$A=\frac{6}{14}+\frac{1}{14}=\frac{6+1}{14}=\frac{7}{14}=\frac{1}{2}=0,5$

$B=1\frac{2}{5}+2\frac{1}{5}=\frac{7}{5}+\frac{11}{5}=\frac{7+11}{5}=\frac{18}{5}=3\frac{3}{5}=3,6$

$C=\frac{2}{13}+\frac{5}{13}+\frac{7}{13}=\frac{2+5+7}{13}=\frac{14}{13}=1\frac{1}{13}=1,0769$

$D=2\frac{1}{10}+\frac{0}{10}=\frac{21}{10}+\frac{0}{10}=\frac{21+0}{10}=\frac{21}{10}=2\frac{1}{10}=2,1$

$E=3+\frac{10}{11}=\frac{3\cdot 11}{11}+\frac{10}{11}=\frac{33}{11}+\frac{10}{11}=\frac{33+10}{11}=\frac{43}{11}=3\frac{10}{11}=3,9091$

$F=\frac{2}{3}+\frac{4}{3}=\frac{2+4}{3}=\frac{6}{3}=2$

$K=0\frac{1}{15}+\frac{7}{15}+3\frac{4}{15}=\frac{19}{5}=3\frac{4}{5}=3,8$

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