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