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CBSE Class 8 Answered

what is the meaning of commutative and distributive in rational numbers
Asked by ajayrath7 | 22 Mar, 2017, 07:32: PM
answered-by-expert Expert Answer
begin mathsize 16px style If space straight p space and space straight q space are space two space rational space numbers comma space then space they space are space commutative space under space addition space which space means
straight p plus straight q space equals space straight q plus straight p
If space straight p space and space straight q space are space two space rational space numbers comma space then space they space are space commutative space under space multiplication space which space means
straight p cross times straight q space equals space straight q cross times straight p

Distributivity space means colon
For space the space rational space numbers comma space straight p comma space straight q space and space straight r comma
straight p cross times left parenthesis straight q plus straight r right parenthesis equals space straight p cross times straight q plus straight p cross times straight r end style
Answered by Rebecca Fernandes | 22 Mar, 2017, 08:10: PM
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fraction numerator left parenthesis square root of 15 space end root space plus space square root of 35 space end root space plus space square root of 21 space end root space plus 5 right parenthesis over denominator square root of 3 space plus space 2 square root of 5 space plus square root of 7 end fraction
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