Concise Selina Solutions for Class 7 maths Chapter 4 Decimal Fractions


In algebra, a decimal fraction is a fraction whose denominator is 10 or a multiple of 10 like 100, 1,000, 10,000, etc. A decimal fraction can be easily converted into a decimal by inserting a decimal separator in the value of numerator at the position from right by the power of ten of denominator. We can also write decimal fractions with a decimal point (without a denominator), that makes easier to solve math calculations like addition and multiplication on fractions.

For example; 7/10, 7/100, 7/1000, etc., are all decimal fractions. 23/10’ 47/100 and 89/1000 are the example of Decimal Fraction are the examples of decimal fractions. These decimal fractions can be expressed as 2.3, 0.47, and 0.089 without the denominators.

Decimal fractions were first developed and used by Chinese at the end of the 4th century BC, and then spread to the Middle East and from there to Europe. Chapter 4 explains concepts like converting a decimal fraction into a fraction and vice versa, decimal places and various mathematical operations on them.