Practice the questions of **McGraw Hill Math Grade 4 Answer Key PDF Chapter 8 Lesson 7 Adding and Subtracting Mixed Numbers **to secure good marks & knowledge in the exams.

## McGraw-Hill Math Grade 4 Answer Key Chapter 8 Lesson 7 Adding and Subtracting Mixed Numbers

**Add or Subtract**

**Add or subtract. Write your answers in simplest form.**

Question 1.

Answer:

The Denominators of the given fractions are same so add the numerators.

\(\frac{3}{8}\) + \(\frac{2}{8}\) = \(\frac{5}{8}\)

1 + 2 + \(\frac{5}{8}\) = 3\(\frac{5}{8}\)

Question 2.

Answer:

The Denominators of the given fractions are same so subtract the numerators.

\(\frac{4}{5}\) – \(\frac{3}{5}\) = \(\frac{1}{5}\)

17 – 9 = 8

8 + \(\frac{1}{5}\) = 8\(\frac{1}{5}\)

Question 3.

Answer:

The Denominators of the given fractions are same so add the numerators.

\(\frac{4}{7}\) + \(\frac{2}{7}\) = \(\frac{6}{7}\)

27 + 32 = 59

59 + \(\frac{6}{7}\) = 59\(\frac{6}{7}\)

Question 4.

Answer:

The Denominators of the given fractions are same so subtract the numerators.

\(\frac{2}{2}\) – \(\frac{1}{2}\) = \(\frac{1}{2}\)

80 – 35 = 45

45 + \(\frac{1}{2}\) = 45\(\frac{1}{2}\)

Question 5.

The length of a baby Gila monster is 5\(\frac{7}{8}\) inches. The length of an adult is 21\(\frac{1}{8}\) inches. How much longer is the adult than the baby?

Answer:

The length of a baby Gila monster is 5\(\frac{7}{8}\) inches.

The length of an adult is 21\(\frac{1}{8}\) inches

21\(\frac{1}{8}\) – 5\(\frac{7}{8}\)

21 – 5 = 16

15\(\frac{9}{8}\) – \(\frac{7}{8}\)

15\(\frac{2}{8}\) or 15\(\frac{1}{4}\) inches