6
1 (a whole).
3 of anything plus 3 more of the same thing is 6 of them.
1 and (3/4) = 1.751.75 + 1.75 = 3.5 (or three and a half)
345
1 and 3/4ths of an inch by 1 and 3/4ths of an inch
Trick question. 18 and 3 4ths is 18 3/4 which is already simplified!
7
13.875
45
7.5 is.
6