Word Problems on Decimals

Problem 1: Sarah bought 3.5 kilograms of apples and 2.75 kilograms of oranges. How many kilograms of fruit did she buy in total?

Solution:

To find the total kilograms of fruit, we add the weights of apples and oranges:

3.5 kg + 2.75 kg = 6.25 kg.

So, Sarah bought 6.25 kilograms of fruit in total.

Problem 2: A car travels at an average speed of 65.5 kilometers per hour for 3.25 hours. How far does it travel?

Solution:

To find the total distance traveled, we multiply the speed by the time:

65.5 km/h × 3.25 h = 212.375 km.

So, the car travels 212.375 kilometers.

Problem 3: Tom has $15.75. He spends $8.50 on a book and $3.25 on snacks. How much money does he have left?

Solution:

To find the remaining money, we subtract the total spent from the initial amount:

$15.75 – ($8.50 + $3.25) = $15.75 – $11.75 = $4.00.

So, Tom has $4.00 left.

Problem 4: A rectangular field measures 12.5 meters in length and 6.75 meters in width. What is the area of the field?

Solution:

To find the area of the field, we multiply the length by the width:

12.5 m × 6.75 m = 84.375 square meters.

So, the area of the field is 84.375 square meters.

Problem 5: During a sale, a store offers a discount of 15% on a TV priced at $450. How much does the TV cost after the discount?

Solution:

To find the discounted price, we calculate 15% of $450 and subtract it from the original price:

15% of $450 = $450 × 0.15 = $67.50.

So, the discounted price is $450 – $67.50 = $382.50.

Decimal is a numerical representation that uses a dot, which we call a decimal point, to separate the whole number part from its fractional part. The decimal numeral system is used as the standard system that is used to distinguish integer and non-integer numbers. In this series of practice questions, we’ll explore the fundamentals of decimals, including their definition, types, and applications.