# McGraw Hill Math Grade 5 Chapter 6 Lesson 9 Answer Key Reasonable Estimate

All the solutions provided in McGraw Hill Math Grade 5 Answer Key PDF Chapter 6 Lesson 9 Reasonable Estimate are as per the latest syllabus guidelines.

## McGraw-Hill Math Grade 5 Answer Key Chapter 6 Lesson 9 Reasonable Estimate

Solve

Estimate the sum or difference. Use front-end estimation.

Question 1.
32$$\frac{2}{9}$$ + 12$$\frac{1}{7}$$ _______________
30 + 10 = 40

Question 2.
45$$\frac{1}{2}$$ – 33$$\frac{1}{5}$$ _______________
50 – 30 = 20.

Explanation:
The difference between $$\frac{91}{2}$$ – $$\frac{166}{5}$$. The front end estimated is 50-30 which is 20.

Question 3.
77$$\frac{5}{9}$$ – 21$$\frac{2}{5}$$ _______________
80 – 20 = 50.

Explanation:
The difference between $$\frac{698}{9}$$ – $$\frac{107}{5}$$. The front end estimated is 80-20 which is 50.

Question 4.
34$$\frac{7}{8}$$ + 22$$\frac{2}{9}$$ _______________
30 + 20 = 50.

Explanation:
The addition of $$\frac{279}{8}$$ + $$\frac{200}{9}$$. The front end estimated is 30+20 which is 50.

Question 5.

1 + 1 = 2.

Explanation:
The addition of $$\frac{5}{6}$$ + $$\frac{6}{7}$$. The front end estimated is 1+1 which is 2.

Question 6.

1 – 0 = 1.

Explanation:
The difference between $$\frac{5}{8}$$ – $$\frac{3}{7}$$. The front end estimated is 1-0 which is 1.

Question 7.

The difference between $$\frac{2}{3}$$ – $$\frac{1}{4}$$. The front end estimated is 1-0 which is 1.
The addition of $$\frac{1}{9}$$ + $$\frac{7}{11}$$. The front end estimated is 0+1 which is 1.