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

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.

Question 1.

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.

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.

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.

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?
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$$\frac{7}{8}$$
15$$\frac{9}{8}$$ – $$\frac{7}{8}$$
15$$\frac{2}{8}$$ or 15$$\frac{1}{4}$$ inches