Practice the questions of **McGraw Hill Math Grade 4 Answer Key PDF Chapter 11 Lesson 8 Problem Solving: Using a Number Line **to secure good marks & knowledge in the exams.

## McGraw-Hill Math Grade 4 Answer Key Chapter 11 Lesson 8 Problem Solving: Using a Number Line

**Solve**

Use the number line to add or subtract.

Question 1.

Laith has a book that is 9\(\frac{1}{4}\) in. long. Jason’s book is 1 \(\frac{2}{4}\) in. longer than Laith’s. How long is Jason’s book?

Answer:

Explanation:

Laith has a book that is 9\(\frac{1}{4}\) in. long

Jason’s book is 1 \(\frac{2}{4}\) in. longer than Laith’s

Add to find

I marked the numbers on the number line and drew jumps forward to add

9\(\frac{1}{4}\) in. + 1\(\frac{2}{4}\) in. = 11

So, Jason’s book is 11 in.

Question 2.

Mia has a string that is 11\(\frac{3}{4}\) in. long. Ian has a string that is 2\(\frac{2}{4}\) in. shorter than Mia’s. How long is Ian’s string?

Answer:

Explanation:

Mia has a string that is 11\(\frac{3}{4}\) in. long

Ian has a string that is 2\(\frac{2}{4}\) in. shorter than Mia’s

Subtract to find

I marked the numbers on the number line and drew jumps backward to subtract

11\(\frac{3}{4}\) in. – 2\(\frac{2}{4}\) in. = 9\(\frac{1}{4}\) in.

So, Lan’s string 9\(\frac{1}{4}\) in. long.