Is 7 1/2 bigger or smaller than 6 19/20? Justify your answer please! Thannnkkkkkssss

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14-05-2017
Mathematics

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Is 7 1/2 bigger or smaller than 6 19/20? Justify your answer please! Thannnkkkkkssss

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Аноним Аноним · Answer 1 · 2017-05-14T16:04:29+02:00

7 1/2 = 7×2+1
--------
2

= 15
--
2

6 19/20 = 6×20+19
-----------
   20

= 139
----
20

LCM = 20

7 1/2 = 15/2

= 15×10
-------
2×10

= 150/20

6 19/20 =  139
-----
20

= 139 ×1
--------
20 × 1

=  139
-----
20

∴ 7 1/2 is greater than 6 19/20