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Students who want to compete at the national and international levels should enroll in Math Olympiad Class 4. Previous exam questions from the class 4 Math Olympiad will aid students in honing and improving their problem-solving abilities. Students may feel confident in their ability to respond to several questions in this class 4 mathematics Olympiad. These class 4 IMO questions are MCQ-based and ask students to use both logical and mathematical reasoning. It is acceptable to practice various question types that might not be included in school textbooks. IMO Class 4 Chapter 5 Decimal Numbers

Even administering these Olympiad tests encourages self-learning and motivates students to perform better on their schoolwork.

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Real numbers, natural numbers, whole numbers, rational numbers, and other types of numbers can all be categorized in mathematics. There are decimal numbers among them. Integer and non-integer numbers are represented using this format as a standard. Let’s talk in-depth about “decimals” in this article, including their types, attributes, and place-value representation of decimal numbers with a ton of worked examples.

IMO Class 4 Chapter 5: Decimal Numbers Detailed Notes

What are Decimals?

One of the number types in algebra that has a whole number and a fractional portion separated by a decimal point is a decimal. The decimal point is the dot that appears between the parts of a whole number and a fraction. 

An example of a decimal number is 34.5.

In this case, the whole number part is 34, and the fractional part is 5.

The decimal point is “.”.

Let’s talk about a few more instances.

The decimal representation of the number “thirty-four and seven-tenths” is given below:

Among Ones and Tenths is where the decimal point is located.

3 tens, 4 ones, and 7 tenths make up the number 34.7.

Properties of Decimals

  • Following are some crucial characteristics of decimal numbers when performing division and multiplication operations:
  • No matter what order any two decimal numbers are multiplied, the result is always the same.
  • Any order of adding a whole number and a decimal number produces the same result.
  • A decimal fraction’s product when multiplied by one is that same decimal fraction.
  • A decimal fraction multiplied by 0 produces a result of zero (0).
  • The result of dividing a decimal number by one is the decimal number itself.
  • When a decimal number is divided by itself, the result is 1, or 1.
  • Any division of 0 by decimal results in a quotient of 0.
  • Since there is no reciprocal of 0, it is impossible to divide a decimal number by 0.

Also Read:  Quick Tips and Tricks to prepare for Olympiads Exams

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1.National Science Olympiad (NSO)

2. International Mathematics Olympiad (IMO)

3. Coding Olympiad 

4.Artificial Intelligence Olympiad.

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