Pre Algebra

How do you Multiply and Divide Rational Numbers?Multiplication of Rational Numbers(a) Let (frac { a }{ b }) and c are two rational numbers, then (frac { a }{ b } times c=frac { ac }{ b }) (b) When we multiply two rational numbers : On…

How do you Calculate Percentages?PercentageWhen we take 100 as the denominator of fractions, the numerators are called percentages. For convenience, the symbol % is used for percent. When we take 100 as the denominator of fractions, the…

How do you Add and Subtract Rational Numbers?There are four basic operations on rational numbers :AdditionSubtractionMultiplicationDivision.Addition of Rational NumbersIf two rational numbers are to be added, we first express each one of…

FACTORS AND MULTIPLES Mr Sharma wanted to withdraw Rs. 1000 from his bank account to purchase books for his children. The cashier gave him 10 hundred-rupee notes, i.e., Rs. 10 × 100 = Rs. 1000 Mr Sharma got the required amount. But the…

Arithmetic Sequences and SeriesA sequence is an ordered list of numbers. The sum of the terms of a sequence is called a series. Read More:What is the pattern of numbers?SequencesWhile some sequences are simply random values, other sequences…

SequencesIn the previous lesson, we learned about pattern of numbers. In this lesson we discuss about Sequences.A sequence is an ordered list of numbers. The sum of the terms of a sequence is called a series.Each number of a sequence is…

Common FactorsWhen two integers are multiplied together, the answer is called a product. The integers that were multiplied together are called the factors of the product. 3 • 6 = 18 (3 and 6 are factors of 18)The greatest common factor of…

Converting To and From Scientific NotationConverting To Scientific NotationTo Change from Standard Form to Scientific Notation:Place the decimal point such that there is one non-zero digit to the left of the decimal point.Count the number…

Absolute ValueThe absolute value of a number can be considered as the distance between 0 and that number on the real number line.Remember that distance is always a positive quantity (or zero). The distance in the diagram below from -3 to 0…

What is a Rational Number?A rational number is a number which can be put in the form (frac { p }{ q }), where p and q are both integers and q ≠ 0. p is called numerator (Nr) and q is called denominator (Dr).You can also go through …