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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Example 1 Find 3/7+((−6)/11)+((−8)/21)+(5/22) 3/7+((−6)/11)+((−8)/21)+(5/22) = 𝟑/𝟕 +((−𝟖)/𝟐𝟏)+((−6)/11)+5/22 =[(3 × 3 + (−8))/21]+[((−𝟔) × 𝟐 + 𝟓)/𝟐𝟐] = [(9 + (−8))/21]+[(−12 + 5)/22] = 𝟏/𝟐𝟏+((−𝟕)/𝟐𝟐) = (1 × 22 + (−7) × 21)/(21 × 22) = (22 − 147)/462 = (−𝟏𝟐𝟓)/( 𝟒𝟔𝟐) Rough For addition, we group denominators Since 7 × 3 = 21 We group 3/7 and ((−8)/21) together And 11 × 2 = 22 We group ((−6)/11) and 5/22 together

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.