(1)33+125+67+75 =(33+67)+(125+75) =100+200 =300; (2)(80+8)×25 =80×25+8×25 =2000+200 =2200; (3)38×101 =38×(100+1) =38×100+38 =3800+38 =3838; (4)(40-4)×25 =40×25-4×25 =1000-100 =900; (5)65×99+65 =65×(99+1) =65×100 =6500; (6)800÷5÷4 =800÷(5×4) =800÷20 =40; (7)125×(27×8) =(125×8)×27 =1000×27 =27000; (8)25×48 =25×(4×12) =(25×4)×12 =100×12 =1200; (9)101×69-69 =(101-1)×69 =100×69 =6900. |