Odčítání 75884

Vyřešte odčítání nebo sčítání zlomků:

1/2 - 1/4 =

4/6 + 2/3 =

5/8 + 3/12 =

1/9 + 2/3 =

8/9 - 7/12 =

11/12 - 3/8 =

2/3 - 2/7 =

3/4 - 3/9 =

3/8 - 1/6 =

3/5 - 4/8 =

2/6 - 1/12 =

3/8 + 3/4 =

5/6 + 4/9 =

1/4 + 3/10 =

6/20 + 4/25 =

6/6 + 1/3 =

Správná odpověď:

A =  1/4
B =  4/3 = 1 ¹⁄₃
C =  7/8
D =  7/9
E =  11/36
F =  13/24
G =  8/21
H =  5/12
I =  5/24
J =  1/10
K =  1/4
L =  9/8 = 1 ¹⁄₈
M =  23/18 = 1 ⁵⁄₁₈
N =  11/20
O =  23/50
P =  4/3 = 1 ¹⁄₃

Postup správného řešení:

$A=\frac{1}{2}-\frac{1}{4}=\frac{2}{4}-\frac{1}{4}=\frac{2-1}{4}=\frac{1}{4}=0,25$

$B=\frac{4}{6}+\frac{2}{3}=\frac{4}{6}+\frac{4}{6}=\frac{4+4}{6}=\frac{8}{6}=\frac{4}{3}=1\frac{1}{3}=1,3333$

$C=\frac{5}{8}+\frac{3}{12}=\frac{15}{24}+\frac{6}{24}=\frac{15+6}{24}=\frac{21}{24}=\frac{7}{8}=0,875$

$D=\frac{1}{9}+\frac{2}{3}=\frac{1}{9}+\frac{6}{9}=\frac{1+6}{9}=\frac{7}{9}=0,7778$

$E=\frac{8}{9}-\frac{7}{12}=\frac{32}{36}-\frac{21}{36}=\frac{32-21}{36}=\frac{11}{36}=0,3056$

$F=\frac{11}{12}-\frac{3}{8}=\frac{22}{24}-\frac{9}{24}=\frac{22-9}{24}=\frac{13}{24}=0,5417$

$G=\frac{2}{3}-\frac{2}{7}=\frac{14}{21}-\frac{6}{21}=\frac{14-6}{21}=\frac{8}{21}=0,381$

$H=\frac{3}{4}-\frac{3}{9}=\frac{27}{36}-\frac{12}{36}=\frac{27-12}{36}=\frac{15}{36}=\frac{5}{12}=0,4167$

$I=\frac{3}{8}-\frac{1}{6}=\frac{9}{24}-\frac{4}{24}=\frac{9-4}{24}=\frac{5}{24}=0,2083$

$J=\frac{3}{5}-\frac{4}{8}=\frac{24}{40}-\frac{20}{40}=\frac{24-20}{40}=\frac{4}{40}=\frac{1}{10}=0,1$

$K=\frac{2}{6}-\frac{1}{12}=\frac{4}{12}-\frac{1}{12}=\frac{4-1}{12}=\frac{3}{12}=\frac{1}{4}=0,25$

$L=\frac{3}{8}+\frac{3}{4}=\frac{3}{8}+\frac{6}{8}=\frac{3+6}{8}=\frac{9}{8}=1\frac{1}{8}=1,125$

$M=\frac{5}{6}+\frac{4}{9}=\frac{15}{18}+\frac{8}{18}=\frac{15+8}{18}=\frac{23}{18}=1\frac{5}{18}=1,2778$

$N=\frac{1}{4}+\frac{3}{10}=\frac{5}{20}+\frac{6}{20}=\frac{5+6}{20}=\frac{11}{20}=0,55$

$O=\frac{6}{20}+\frac{4}{25}=\frac{30}{100}+\frac{16}{100}=\frac{30+16}{100}=\frac{46}{100}=\frac{23}{50}=0,46$

$P=\frac{6}{6}+\frac{1}{3}=\frac{6}{6}+\frac{2}{6}=\frac{6+2}{6}=\frac{8}{6}=\frac{4}{3}=1\frac{1}{3}=1,3333$

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