✒ MATH
A.
[tex] \sf 1. \: \frac{3}{7} + \frac{2}{7} = \frac{5}{7} [/tex]
[tex] \sf \: 2. \: \frac{5}{21} + \frac{11}{21} = \frac{16}{21} [/tex]
[tex] \sf \: 3. \: \frac{25}{36} + \frac{5}{36} = \frac{5}{6} [/tex]
[tex] \sf \: 4. \: \frac{3}{13} + \frac{10}{13} = 1[/tex]
[tex] \sf \: 5. \: \frac{7}{24} + \frac{11}{24} = \frac{3}{4} [/tex]
[tex] \sf \: 6. \: \frac{5}{18} \: + \frac{17}{18} = 1\frac{2}{9} [/tex]
B.
[tex] \sf \: 1. \: \frac{3}{11} + \frac{7}{9} = 1 \frac{5}{99} [/tex]
[tex] \sf \: 2. \: \frac{5}{8} + \frac{5}{6} = 1 \frac{11}{24} [/tex]
[tex] \sf \: 3. \: \frac{6}{7} + \frac{12}{35} = 1 \frac{1}{5} [/tex]
[tex] \sf \: 4. \: \frac{2}{9} + \frac{1}{12} = \frac{11}{36} [/tex]
I hope it helps.
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