Fill in the blanks.
14=2□=□16=□64=3□
14=2x1[2x4]=[4x1]4x4=[16x1]16x4=3x1[3x4] .
Find the missing numeral :
57= □56
1518=□6=□30
12□=68
Fill in the blanks with appropriate numbers:
(1)
(2)
(3)
