Addition of decimals

To add decimals,

  First we convert them into fractions

and

  then we convert the final fraction into decimal

 

Let’s take an example

 

Add 0.08 + 9.831 + 0.8956

 

0.08 + 9.831 + 0.8956

= 008/100 + 9831/1000 + 08956/10000

= 8/100 + 9831/1000 + 8956/10000

= 8/100 × 100/100 + 9831/1000 × 10/10 + 8956/10000

= 800/10000 + 98310/10000 + 8956/10000

= (800 + 98310 + 8956)/10000

= (98310 + 8956 + 800)/10000

= 108066/10000

= 10.8066

48.jpg

 

Add 49.59 + 53. 481 + 1000.003

 

49.59 + 53.481 + 1000.003

= 4959/100 + 53481/1000 + 1000003/1000

= (4959)/100 × 10/10 + 53481/1000 + 1000003/1000

= (49590)/1000 + 53481/1000 + 1000003/1000

= (49590 + 53481 + 1000003)/1000

= (1000003 + 49590 + 53481)/1000

= 1103074/1000

= 1103.074

49.jpg

 

  1. Chapter 2 Class 7 Fractions and Decimals
  2. Concept wise

Transcript

Addition of decimalsTo add decimals, First we convert them into fractions and then we cannot the final fraction into decimal Let’s take an example Add 0.08 + 9.831 + 0.8956 0.08 + 9.831 + 0.8956 = 008/100 + 9831/1000 + 08956/10000 = 8/100 + 9831/1000 + 8956/10000 = 8/100 × 100/100 + 9831/1000 × 10/10 + 8956/10000 = 800/10000 + 98310/10000 + 8956/10000 = (800 + 98310 + 8956)/10000 = (98310 + 8956 + 800)/10000 = 108066/10000 = 10.8066 Add 49.59 + 53. 481 + 1000.003 49.59 + 53.481 + 1000.003 = 4959/100 + 53481/1000 + 1000003/1000 = (4959 )/100 × 10/10 + 53481/1000 + 1000003/1000 = (4959 )/100 + 53481/1000 + 1000003/1000 = (49540 + 53481 + 1000003)/1000 = (1000003 + 49590 + 53481)/1000 = 1103074/1000 = 1103.074

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.