5/12 + 7/12 = 1
5/6 + 4/7 = 59/42
5/6 + 7/8 = 41/24
5/6 x 7/8 = 35/48
3/8 x 16/21 = 2/7
7/20 : 4/5 = 7/16
11/14 - 9/14 = 2/14 = 1/7
8/7 - 4/5 = 12/35
17/18 - 5/6 = 1/9
4/9 x 9/16 = 1/4
21/22 : 7/11 = 3/2
1/36 : 5/12 = 1/15
a) \(\dfrac{5}{12}+\dfrac{7}{12}=\dfrac{12}{12}=1\)
b) \(\dfrac{5}{6}+\dfrac{4}{7}=\dfrac{35}{42}+\dfrac{24}{42}=\dfrac{59}{42}\)
c) \(\dfrac{5}{6}+\dfrac{7}{8}=\dfrac{20}{24}+\dfrac{21}{24}=\dfrac{41}{24}\)
d) \(\dfrac{5}{6}\times\dfrac{7}{8}=\dfrac{5\times7}{6\times8}=\dfrac{35}{48}\)
e) \(\dfrac{3}{8}\times\dfrac{16}{21}=\dfrac{3\times16}{8\times21}=\dfrac{48}{168}=\dfrac{2}{7}\)
g) \(\dfrac{7}{20}:\dfrac{4}{5}=\dfrac{7}{20}\times\dfrac{5}{4}=\dfrac{35}{80}=\dfrac{7}{16}\)
h) \(\dfrac{11}{14}-\dfrac{9}{14}=\dfrac{2}{14}=\dfrac{1}{7}\)
i) \(\dfrac{8}{7}-\dfrac{4}{5}=\dfrac{40}{35}-\dfrac{28}{35}=\dfrac{12}{35}\)
j)\(\dfrac{17}{18}-\dfrac{5}{6}=\dfrac{17}{18}-\dfrac{15}{18}=\dfrac{2}{18}=\dfrac{1}{9}\)
k) \(\dfrac{4}{9}\times\dfrac{9}{16}=\dfrac{36}{144}=\dfrac{1}{4}\)
l) \(\dfrac{21}{22}:\dfrac{7}{11}=\dfrac{21}{22}\times\dfrac{11}{7}=\dfrac{3}{2}\)
m) \(\dfrac{1}{36}:\dfrac{5}{12}=\dfrac{1}{36}\times\dfrac{12}{5}=\dfrac{12}{180}=\dfrac{1}{15}\)
5/12 + 7/12 = 12/12=1
5/6 + 4/7 = 59/42
5/6 + 7/8 = 41/24
5/6 x 7/8 = 35/48
3/8 x 16/21 = 2/7
7/20 : 4/5 = 7/16
11/14 - 9/14 = 2/14 = 1/7
8/7 - 4/5 = 12/35
17/18 - 5/6 = 1/9
4/9 x 9/16 = 1/4
21/22 : 7/11 = 3/2
1/36 : 5/12 = 1/15
