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निम्नलिखित में से कौन - से युग्म एक ही ...

निम्नलिखित में से कौन - से युग्म एक ही परिमेय संख्या को निरूपित करते हैं ?
(i) `(-7)/(21)`और`3/9` , (ii) `(-16)/(20)` और `(20)/(-25) ` , (iii) `(-2)/(3)` और`2/3`
(iv) `(-3)/(5)` और `(-12)/(20)` , (v) `8/(-5)` और `(24)/(-15)` , (vi) `1/3` और `(-1)/(9)`
(vii) `(-5)/(-9)` और `(5)/(-9)`

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Which of the following pairs represent the same rational number ? (i) (-7)/21 and 3/9 (ii) 16/20 and 20/(-25) (iii) (-2)/(-3) and 2/3 (iv) (-3)/(-5) and (-12)/20 (v) 8/(-5) and (-24)/15 (vi) 1/3 and (-1)/9 (vii) (-5)/(-9) and 5/(-9)

Which of the following pairs represent the same rational number ? (i) (-7)/21 and 3/9 (ii) 16/20 and 20/(-25) (iii) (-2)/(-3) and 2/3 (iv) (-3)/(-5) and (-12)/20 (v) 8/(-5) and (-24)/15 (vi) 1/3 and (-1)/9 (vii) (-5)/(-9) and 5/(-9)

Find the sum : (i) 5/4 + ((-11)/(4)) , (ii) 5/3 + 3/5 , (iii) (-9)/(10) + 22/15 (iv) (-3)/(-11) + 5/9 , (v) (-8)/(19) + ((-2))/(57) , (vi) (-2)/(3) + 0 (vii) -2'1/3 + 4'3/5

Evaluate : (i) (3)/(4)-(4)/(5) (ii) -3-(4)/(7) (iii) (7)/(24)-(19)/(36) (iv) (14)/(15)-(13)/(20) (v) (4)/(9)-(2)/(-3) (vi) (7)/(11)- (-4)/(-11) (vii) (-5)/(14) -(-2)/(7) (viii) (-5)/(-8)-(-3)/(4)

Simplify : (i) (3)/(20)xx(4)/(5) (ii) (-7)/(30)xx(5)/(14) (iii) (5)/(-18)xx(-9)/(20) (iv) (-9)/(8)xx(-16)/(3) (v) -32xx(-7)/(36) (vi) (16)/(-21)xx(-14)/(5)

Multiply : (i) (3)/(4) by (5)/(7) (ii) (9)/(8) by (32)/(2) (iii)(7)/(6) by 24 (iv) (-2)/(3) by (6)/(7) (v) (-12)/(5) by (10)/(-3) (vi) (25)/(-9) by (3)/(-10) (vii) (-7)/(10) by (-40)/(21) (viii) (-36)/(5) by (20)/(-3) (ix) (-13)/(15) by (-25)/(26)