Practice with Unlike Denominators

1. Subtract.

$6 \dfrac{2}{5}-3 \dfrac{1}{4}= \text{________}$

2. Add.

$\dfrac{2}{3}+2 \dfrac{1}{6}= \text{________}$

3. Subtract.

$2 \dfrac{3}{4}-\dfrac{5}{16}= \text{________}$

4. Add.

$4 \dfrac{1}{2}+1 \dfrac{2}{5}= \text{________}$

Source: Khan Academy, https://www.khanacademy.org/math/cc-fifth-grade-math/imp-fractions-3/imp-adding-and-subtracting-mixed-number-with-unlike-denominators/e/adding_subtracting_mixed_numbers_1
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1. $6 \dfrac{2}{5}-3 \dfrac{1}{4}=3 \dfrac{3}{20}$

2. $\dfrac{2}{3}+2 \dfrac{1}{6}=2 \dfrac{5}{6}$

3. $2 \dfrac{3}{4}-\dfrac{5}{16}=2 \dfrac{7}{16}$

4. $4 \dfrac{1}{2}+1 \dfrac{2}{5}=5 \dfrac{9}{10}$