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.