①6.33×101-6.33,=6.33×(101-1),=6.33×100,=633;②3.7×28+3.7×2,=3.7×(28+2),=3.7×30,=111;③25×125×4×0.08,=(25×4)×(125×0.08),=100×10,=1000;④10×0.2÷2.5,=2÷2.5,=0.8;⑤12.5×8÷2.5,=100÷2.5,=400;⑥(7.7+1.4)÷0.7,=9.1÷0.7,=13;