Simple Equations Introduction to Simple Equations Variables and Expressions Variable is a quantity that can take any value, its value is not fixed. It is a symbol for a number whose value is unknown yet. Expressions are formed by performing operations like addition, subtraction, multiplication and division on the variables. Example: 6x – 3 is […]
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Data Handling Double Bar Graphs Double bar graphs are an effective tool to compare the values of two quantities for the same observation. For example, consider the marks obtained by five students of a class in two tests. Using a double bar graph, we can analyses which week students had better marks. Double Bar Graphs
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Fractions and Decimals Introduction: Fractions The word fraction derives from the Latin word “Fractus” meaning broken. It represents a part of a whole, consisting of a number of equal parts out of a whole. E.g. : slices of a pizza. 10, 39, 389 To know more about Fractions, visit here. Fractions play an important part
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Integers Properties of integers For a, b ϵ I, we have: a + b ϵ I a – b ϵ I a × b ϵ I If a, b ϵ I, then a + b = b + a a × b = b × a If a, b, c ϵ I, then a +
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