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CBSE Class 8 Answered

Verify the closure property of addition for -19/18 and -11/12
Asked by esther.rlrr | 10 Jun, 2019, 06:22: PM
answered-by-expert Expert Answer
begin mathsize 16px style fraction numerator negative 19 over denominator 18 space end fraction space and space fraction numerator negative 11 over denominator 12 space end fraction space are space the space two space rational space numbers. fraction numerator negative 19 over denominator 18 space end fraction space plus space open parentheses fraction numerator negative 11 over denominator 12 space end fraction close parentheses space equals space fraction numerator negative 19 cross times 2 over denominator 18 cross times 2 space end fraction space plus space open parentheses fraction numerator negative 11 cross times 3 over denominator 12 cross times 3 space end fraction close parentheses space space space space.... space since space LCM left parenthesis 12 comma space 18 right parenthesis space equals space 36 space space space space space space space space space space space space space space space space space space space space space space space space space space equals space fraction numerator negative 38 space minus space 33 space over denominator 36 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space equals space fraction numerator negative 71 over denominator 36 end fraction fraction numerator negative 71 over denominator 36 end fraction space is space also space straight a space rational space number. straight C losure space property space of space addition space of space rational space numbers. Addition space of space two space rational space numbers space is space also space straight a space rational space number. end style
Answered by Yasmeen Khan | 10 Jun, 2019, 06:39: PM

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