33*66+33*6-33*2
=2178+33*6-33*2
=2178+198-33*2
=2178+198-66
=2376-66
=2310
103*25
= 2575
96*125
=12000
42*(20+5)
=42*25
=1050
1.用简便的方法计算：33乘66+33乘6-33乘2 103乘25 96乘125 42乘（20+5）用递等式计算.
33*66+33*6-33*2
=2178+33*6-33*2
=2178+198-33*2
=2178+198-66
=2376-66
=2310
103*25
= 2575
96*125
=12000
42*(20+5)
=42*25
=1050