10 th maths chapter 1 real numbers all formula
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1. Natural Numbers N = {1,2,3,4,5 >
It is the counting numbers
2. Whole number W= {0,1,2,3,4,5>
It is the counting numbers + zero
3. Integers
All whole numbers including Negative number + Positive number ……-4,-3,-2,-1,0,1,2,3,4,5… so on.
Like whole numbers, integers don’t include fractions or decimals
4. Positive integers Z+ = 1,2,3,4,5, ……
5. Negative integers Z– = -1,-2,-3,-4,-5, ……
6 Rational Number A number is called rational if it can be expressed in the form p/q where p and q are integers (q> 0).
Ex: P/q, 4/5
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