Question

adding and subtracting (like denominators)

1. \\(\frac{4}{5} + \frac{5}{5} - \frac{7}{5} =\\)
2. \\(\frac{25}{3} - \frac{3}{3} - \frac{10}{3} =\\)
3. \\(\frac{10}{13} - \frac{7}{13} + \frac{9}{13} =\\)
4. \\(\frac{40}{85} + \frac{60}{85} - \frac{55}{85} =\\)
5. \\(\frac{10}{2} - \frac{4}{2} - \frac{2}{2} =\\)
6. \\(\frac{30}{42} - \frac{25}{42} + \frac{1}{42} =\\)
7. \\(\frac{12}{25} + \frac{8}{25} - \frac{10}{25} =\\)
8. \\(\frac{35}{19} + \frac{25}{19} - \frac{3}{19} =\\)
9. \\(\frac{6}{8} + \frac{5}{8} + \frac{7}{8} =\\)
10. \\(\frac{4}{7} + \frac{3}{7} - \frac{2}{7} =\\)
11. \\(\frac{75}{50} + \frac{20}{50} - \frac{55}{50} =\\)
12. \\(\frac{4}{12} + \frac{9}{12} - \frac{11}{12} =\\)

Explanation:

Problem 1

Step1: Add numerators first

$4 + 5 - 7 = 2$

Step2: Keep denominator

$\frac{2}{5}$

Step1: Subtract numerators

$25 - 3 - 10 = 12$

Step2: Keep denominator

$\frac{12}{3}=4$

Step1: Subtract then add numerators

$10 - 7 + 9 = 12$

Step2: Keep denominator

$\frac{12}{13}$

Answer:

$\frac{2}{5}$

Problem 2