Study Guides | rational numbers | Comparing, ordering, adding, subtracting rational numbers

Study Guide: Comparing, ordering, adding, subtracting rational numbers

2-3. Adding or Subtracting Rational Numbers

Example 1: Adding Fractions

$$\begin{array}{rl}\frac{3}{7}+\frac{4}{7}& =\\ \frac{(3+4)}{7}& =\frac{7}{7}=1\end{array}$$

Example 2: Subtracting Fractions

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17. $\frac{-8}{13}+\frac{2}{13}=$

18. $\frac{3}{5}-\frac{-4}{5}=$

19. $\frac{-2}{9}+\frac{-7}{9}=$

20. $\frac{-5}{12}-\frac{-7}{12}=$

21. $\frac{-9}{11}+\frac{10}{11}=$

22. $\frac{5}{13}-\frac{-7}{13}=$

2-3. Multiplying Rational Numbers

Example 3: Multiplying Fractions

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Video: Irrational Numbers (6:40)