1. Home
  2. >Basic Math
  3. >Operations of Decimals
Help

Adding and subtracting decimals

Everything You Need in One Place

Homework problems? Exam preparation? Trying to grasp a concept or just brushing up the basics? Our extensive help & practice library have got you covered.

Learn and Practice With Ease

Our proven video lessons ease you through problems quickly, and you get tonnes of friendly practice on questions that trip students up on tests and finals.

Instant and Unlimited Help

Our personalized learning platform enables you to instantly find the exact walkthrough to your specific type of question. Activate unlimited help now!

Get the most by viewing this topic in your current grade. Pick your course now.

?
Intros
Lessons
  1. i) How to add decimals?
    ii) How to subtract decimals?
?
Examples
Lessons
  1. Evaluate. Then, round your answer to the nearest tenth.
    1. 62.04 – 31.03
    2. 98 + 38.97
    3. 675.92 – 324.7
    4. 30.5 – 40
  2. The table shows the approximate lengths of some dinosaurs.

    Dinosaur

    Height

    Dryosaurus

    6.52ft

    Chasmosaurus

    6.2ft

    Ankylosaurus

    7.22ft

    Dravidosaurus

    4.1ft

    1. Find the difference in length between the longest and shortest dinosaur.
    2. Arrange the dinosaurs in order from shortest to longest.
    3. How much longer is the Ankylosaurus than the Dryosaurus?
  3. Anna went to a store to buy some strings for an art project. She needs four pieces of string with lengths 14 cm, 15.61 cm, 12.55 cm, and 11.3 cm. Each pack of string has a total length of 25 cm. How many packs of string does she need to complete her project?
    ?
    Practice
    Topic Notes
    ?
    In this section, we will add and subtract decimal numbers. The process of adding and subtracting decimal numbers is the same as adding and subtracting whole numbers. For example, both involve regrouping. After lining up the decimals, you will sometimes have to add one or more zeroes to a number after the decimal point. Being able to add and subtract decimal numbers is an important life skill, especially when dealing with money and purchases.
    Basic Concepts
    ?
    Related Concepts
    ?