what is this a thired of thirty is well half of thirty is 15 1 quarter of thirty is 7 and a half but one third must be bigger then i quarter but smaller then one half . So the answer is .............
10
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1/30
3/10 + 1/3... = 9/30 + 10/30... = 19/30
One third (1/3) (30 x 3 = 90 so 30 is 1/3 of 90)
1/3 + 7/10 = 1 1/30
One third of 90 is 30 90 divided by 3 is 30. So, one third of 90 is 30, because 30+30+30=90.