33
33 x 33/3 = 33 x 11 = 363
3 + .3 + .33
20
try 11 times (practicing your time tables will be a great help later on)
It could be: 33-(3+3) = 21
1,000 x 3 = 3,000
102 ÷ 3 = 34
3 * 3 / ( 3 * 3 ) = 1 but that uses only four 3s, so 33 / ( 3 * 3 * 3 ) = 1 uses five 3s
33/3 = 11
33 + (3/3)
32