(1)3.64÷4+4.36×25%=3.46× 1 4 +4.36× 1 4 ,=(3.46+4.36)× 1 4 ,=8× 1 4 ,=2;(2)3.2×25×12.5,=0.8×4×25×12.5,=(4×25)×(12.5×0.8),=100×10,=1000;(3) 3 4 ÷[56×( 3 7 ? 3 8 )],= 3 4 ÷[56× 3 56 ],= 3 4 ÷3,= 1 4 .