(1)44×25,
=11×(4×25),根据乘法结合律,
=11×100,
=1100;
(2)(1-
1
4 -
5
12 )÷
2
3 ,
=(1-
3
12 -
5
12 ) ÷
2
3 ,
=
1
3 ×
3
2 ,
=
1
2 ;
(3)
3
5 ×12+
3
5 ×14-
3
5 ,
=
3
5 × (12+14-1),
=
3
5 × 25,
=15;
(4)
4
9 ×[
3
4 -(
11
16 -
1
2 )].
=
4
9 × [
3
4 -
3
16 ],
=
4
9 ×
9
16 ,
=
1
4 .