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3 of anything plus 3 more of the same thing is 6 of them.
1 (a whole).
3 5ths+3 fourths=17 20ths
19/12
345
12 and 3/4.
6
1 and (3/4) = 1.751.75 + 1.75 = 3.5 (or three and a half)
17/12
4 and 1/4
7 3/4ths
11/12 + 3/4=11/12 + 9/12= 20/12=5/3
2/4 (reduced to 1/2) + 1/4 = 3/4.
7 1/2 + 6 3/4= 14 1/4