Go through the Math in Focus Grade 3 Workbook Answer Key Chapter 5 Practice 1 Real-World Problems: Addition and Subtraction to finish your assignments.

## Math in Focus Grade 3 Chapter 5 Practice 1 Answer Key Real-World Problems: Addition and Subtraction

**Solve. Use bar models to help you.**

Example

A biking team raises $4,250 for charity.

A running team raises $825 more than the biking team.

a. How much money does the running team raise?

b. How much money do both teams raise in all?

$ __4,250__ $ __5,075__ = $__9,325__

Both teams raise $__9,325__ in all.

**Solve. Use bar models to help you.**

Question 1.

The third graders collect 487 cans of food for a food drive. The second graders collect 175 fewer cans than the third graders.

a. How many cans do the second graders collect?

The second graders collect __________ cans.

Answer:

Number of cans of food for a food drive the second graders collect = 312.

Explanation:

Number of cans of food for a food drive the third graders collect = 487.

The second graders collect 175 fewer cans than the third graders.

=> Number of cans of food for a food drive the second graders collect = Number of cans of food for a food drive the third graders collect – 175

= 487 – 175

= 312.

b. How many cans do both grades collect in all?

___ ___ = ____

Both grades collect ___ cans in all.

Answer:

Total number of cans of food for a food drive the second and third graders collect = 799.

Explanation:

Number of cans of food for a food drive the third graders collect = 487.

Number of cans of food for a food drive the second graders collect = 312.

Total number of cans of food for a food drive the second and third graders collect = Number of cans of food for a food drive the third graders collect + Number of cans of food for a food drive the second graders collect

= 487 + 312

= 799.

**Solve. Use bar models to help you.**

Question 2.

A bookstore has 4,320 books and magazines. It has 2,169 books. The rest are magazines.

a. How many magazines does the bookstore have?

The bookstore has ___ magazines.

Answer:

Number of magazines the bookstore has = 2151.

Explanation:

Number of books and magazines a bookstore has = 4,320.

Number of books it has = 2,169.

Number of magazines the bookstore has = Number of books and magazines a bookstore has – Number of books it has

= 4320 – 2169

= 2151.

b. There are 1,493 fashion magazines. The rest are sports magazines.

How many sports magazines does the bookstore have?

The bookstore has ___ sports magazines.

Answer:

The bookstore has 658 sports magazines.

Explanation:

Number of magazines the bookstore has = 2151.

Number of fashion magazines = 1493.

Number of sports magazines the bookstore has = Number of magazines the bookstore has – Number of fashion magazines

= 2151 – 1493

= 658.

**Solve. Use bar models to help you.**

Question 3.

Ray’s rope is 1 452 centimeters long. Hannah’s rope is 379 centimeters longer than Ray’s rope.

a. How long is Hannah’s rope?

Hannah’s rope is ____ centimeters long.

Answer:

Hannah’s rope is 1831.centimeters long.

Explanation:

Number of centimeters long Ray’s rope = 1 452.

Hannah’s rope is 379 centimeters longer than Ray’s rope.

=> Number of centimeters long Hannah’s rope = Number of centimeters long Ray’s rope + 379

= 1452 + 379

= 1831.

b. Ray uses 645 centimeters of his rope. How long is his remaining rope?

Ray’s remaining rope is ___ centimeters long.

Answer:

Ray’s remaining rope is 807 centimeters long.

Explanation:

Number of centimeters long Ray’s rope = 1 452.

Number of centimeters long Ray’s uses his rope = 645.

Number of centimeters long of his rope is remaining = Number of centimeters long Ray’s rope – Number of centimeters long Ray’s uses his rope

= 1 452 – 645

= 807.