Practice Adding and Subtracting Mixed Numbers

Complete this assessment to practice adding and subtracting mixed numbers. Be sure to check your answers.

Problems

1. Archer made a tunnel for his hamster out of two cardboard tubes. One tube was 8 \dfrac{5}{8} \, \text{in} long. The other tube was 7 \dfrac{6}{8}  \, \text{in} long.

What is the total length of the tunnel?

______ inches

2. Kayden walks \dfrac{4}{5} \, \text{kilometers} to a friend's house. Then he and his friend walk 1 \dfrac{3}{5}  \, \text{kilometers} more to go fishing at their favorite pond.

How far did Kayden walk all together?

______ kilometers

3. After a rain storm, Lily measures the depth of several puddles in her backyard. She records her results in a table.

Puddle Depth(inches)
On the lawn \dfrac{3}{4}
On the sidewalk  \dfrac{2}{4}
Under the swing  1 \dfrac{1}{4}

How much deeper was the puddle under the swing than the puddle on the sidewalk?

______ inches

4. Kyra and some friends go to a climbing gym. She records how high each person climbed.

Person Height (m)
Kyra 5 \dfrac{40}{100}
Jake 7 \dfrac{10}{100}
Mynna 4 \dfrac{85}{100}


What is the total height climbed by Kyra and Jake?

_____ meters


Source: Khan Academy, https://www.khanacademy.org/math/cc-fourth-grade-math/imp-fractions-2/adding-and-subtracting-mixed-numbers-word-problems/e/add-and-subtract-mixed-numbers-word-problems--like-denominators-
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