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Question 2 (i) - Addition and Subtraction of Algebraic Expressions - Chapter 10 Class 7 Algebraic Expressions

Last updated at May 18, 2023 by

Ex 12.2, 2 - Add: (i) 3mn, -5mn, 8mn, -4mn (ii) t - 8tz, 3tz - z, z-t

 

 

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Transcript

Question 2 Add: (i) 3mn, – 5mn, 8mn, – 4mn 3mn + (–5mn) + 8mn + (–4mn) = 3mn – 5mn + 8mn – 4mn = mn (3 – 5 + 8 – 4) = mn (3 + 8 – 5 – 4) = mn (11 – (5 + 4)) = mn (11 – 9) = mn × 2 = 2mn 1

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