Practice the problems of Math in Focus Grade 4 Workbook Answer Key Chapter 8 Practice 4 Real-World Problems: Decimals to score better marks in the exam.

## Math in Focus Grade 4 Chapter 8 Practice 4 Answer Key Real-World Problems: Decimals

**Solve. Show your work.**

Example

1 pound of grapes costs $1.79 and 1 pound of peaches costs $1.49. What is the total cost of 1 pound of grapes and 1 pound of peaches?

Cost of grapes + cost of peaches

$1,79 + $1,49 = $3,20

The total cost of 1 pound of grapes and 1 pound of peaches is $323.

Question 1.

A tank is full of water. After 16.5 liters of water are used, 8.75 liters of water are left. How much water was in the full tank?

Answer:

Number of liters of water was in the full tank = 25.25.

Explanation:

Number of liters of water are used = 16.5.

Number of liters of water are left = 8.75.

Number of liters of water was in the full tank = Number of liters of water are used + Number of liters of water are left

= 16.5 + 8.75

= 25.25.

Question 2.

A piece of fabric is 4.5 yards long. A customer buys 2.35 yards of the fabric. How many yards of fabric are left?

Answer:

Number of yards of fabric are left = 2.15.

Explanation:

Number of yards of a piece of fabric = 4.5 yards.

Number of yards of the fabric a customer buys = 2.35 yards.

Number of yards of fabric are left = Number of yards of a piece of fabric – Number of yards of the fabric a customer buys

= 4.5 – 2.35

= 2.15.

Question 3.

Mr. Larson lives 8.7 miles from school. He was driving home from school and stopped 3.5 miles along the way at a supermarket. How much farther does he have to drive before he reaches home?

Answer:

Number of miles he have to drive before he reaches home = 5.2.

Explanation:

Number of miles Mr. Larson lives from school = 8.7.

Number of miles he was driving home from school and stopped along the way at a supermarket = = 3.5.

Number of miles he have to drive before he reaches home = Number of miles Mr. Larson lives from school – Number of miles he was driving home from school and stopped along the way at a supermarket

= 8.7 – 3.5

= 5.2.

Question 4.

A grocery store is having a sale. A loaf of wheat bread regularly costs $2.29, but the sale price is $1.79. The store is also offering 50¢ off on a gallon of fresh milk. If Mrs. Larson buys a gallon of fresh milk and a loaf of wheat bread, how much does she save on her purchases?

Answer:

Amount of money she save on her purchases = $1.0.

Explanation:

Cost price of a loaf of wheat bread regularly = $2.29.

Selling price of the loaf of wheat bread = $1.79.

Cost of fresh milk a store offering = 50¢.

Amount of money she save on her purchases = (Cost price of a loaf of wheat bread regularly – Selling price of the loaf of wheat bread ) + Cost of fresh milk a store offering

= ($2.29 – $1.79) + 50¢

= $0.5 + 50¢

= $1.0

Question 5.

Lily bought a skirt for $25.90 and a shirt for $19.50. She paid the cashier $50. How much change did she receive?

Answer:

Amount of change she received = $4.6.

Explanation:

Cost of a skirt Lily bought = $25.90.

Cost of a shirt Lily bought = $19.50.

Amount of money she paid the cashier = $50.

Amount of change she received = Amount of money she paid the cashier – (Cost of a skirt Lily bought + Cost of a shirt Lily bought)

= $50 – ( $25.90 + $19.50)

= $50 – $45.40

= $4.6.

Question 6.

Shannon collects rainwater to water her flowers. She has one bucket with 3.4 gallons of water and another with 1.85 gallons less. She uses both buckets to water the flowers. How many gallons of water does she use?

Answer:

Number of gallons she uses both buckets to water the flowers = 4.95.

Explanation:

Number of gallons one bucket she has = 3.4 gallons.

She has one bucket with 3.4 gallons of water and another with 1.85 gallons less.

=> Number of gallons other bucket she has = Number of gallons one bucket she has – 1.85

=> 3.4 – 1.85

=> 1.55.

Number of gallons she uses both buckets to water the flowers = Number of gallons one bucket she has + Number of gallons other bucket she has

= 3.4 + 1.55

= 4.95.