# McGraw Hill Math Grade 4 Chapter 10 Lesson 8 Answer Key Problem Solving: Working Backward

Practice the questions of McGraw Hill Math Grade 4 Answer Key PDF Chapter 10 Lesson 8 Problem Solving: Working Backward to secure good marks & knowledge in the exams.

## McGraw-Hill Math Grade 4 Answer Key Chapter 10 Lesson 8 Problem Solving: Working Backward

Solve

Question 1.
The owner of a gift stop has a large spool of wrapping paper. She uses 13$$\frac{2}{5}$$ yards of paper in one week and 16$$\frac{1}{5}$$ yards of paper the next week. She has 41$$\frac{1}{5}$$ yards of paper left over. How many yards of wrapping paper did she start with?
70$$\frac{4}{5}$$

Explanation:
The owner of a gift stop has a large spool of wrapping paper
She uses 13$$\frac{2}{5}$$ yards of paper in one week
16$$\frac{1}{5}$$ yards of paper the next week
She has 41$$\frac{1}{5}$$ yards of paper left over
13$$\frac{2}{5}$$ + 16$$\frac{1}{5}$$ + 41$$\frac{1}{5}$$ = 70$$\frac{4}{5}$$
The owner of a gift shop has 70$$\frac{4}{5}$$ yards of wrapping paper she started with.

Question 2.
Toshi drove from home to work. Then he drove from work to Beth s house. He drove 13$$\frac{1}{4}$$ miles south, then 29 miles east, then another 8$$\frac{1}{4}$$ miles south. He drove a total of 55$$\frac{3}{4}$$ miles for the entire day. How many miles did he drive from home to work?
70$$\frac{4}{5}$$

Explanation:
Toshi drove from home to work
Then he drove from work to Beth s house
He drove 13$$\frac{1}{4}$$ miles south
Then 29 miles east
Then another 8$$\frac{1}{4}$$ miles south
13$$\frac{1}{4}$$ + 29 + 8$$\frac{1}{4}$$Â  = 50$$\frac{2}{4}$$
He drove a total of 55$$\frac{3}{4}$$ miles for the entire day
55$$\frac{3}{4}$$ – 50$$\frac{2}{4}$$ = 5$$\frac{1}{4}$$
So, Toshi drove 5$$\frac{1}{4}$$ miles from home to work.

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