Decimals: Free Guide Decimals To Fractions, Adding, Multiplying

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Decimals – What?

The decimal system is based on 10. It is an extension of the place value system of whole numbers.

The decimal point separates whole numbers from the numbers less than 1. The value of a digit in a decimal depends on the place value of the digit in the decimal.

Decimals enable us to do very accurate measurements. It measures tenths, hundredths, thousandths and so on by using adding decimals, subtracting decimals, multiplying decimals, dividing decimals and etc.

Decimals – Why Important?

Decimal numbers are widely used in our daily situations. The following situation shows how decimals are used. “John’s weight is 35.1 kg and he is 1.4 m tall. His home is 12.5 km away from the school. One morning while taking his breakfast, he noticed the nutritional values stated on the tin of cream crackers which stated that 3 pieces of cream crackers contain 20.9 g carbohydrate, 2.8 g protein, 15.6 g fat and etc.

Modern methods of writing decimals were invented less than 500 years ago. However, the use of decimals in various forms can be traced back to thousands of years ago. The Babylonians used a number system based on 60 and extended it to deal with numbers less than 1. Decimals as they look today were used by John Napier, a Scottish mathematician who developed the use of logarithms for carrying out calculations.

Today, decimal is widely used in many aspects such as measurements involving lengths, heights, distance, weights, volume, temperature- reading, speedometers, and so on. Decimals is especially related to fractions and percent in math involving converting decimal to fraction, or converting fraction to decimal, decimal to percent or percent to decimal.

Basic Decimals Lesson

Reading and Writing Decimals

Decimal Place Value

Teaching Decimals

Rounding Decimals

Adding and Subtracting Decimals

Adding Decimals

Subtracting Decimals

Adding and Subtracting Decimals

Multiplying and Dividing Decimals

Multiplying Decimals

Dividing Decimals