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Adding and subtracting decimal numbers

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Intros
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Lessons
  1. i) How to add decimals?
    ii) How to subtract decimals?
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Examples
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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?