①(3.2+1.2)÷0.08
②0.4×(3.2-0.8)÷1.2
③0.75÷2.5÷0.4
④4.5×1.2-3.15÷15
⑤(7.5-2.3×0.4)÷0.01
⑥12.6÷3.6+9÷3.6
①3.02×(2.52÷1.2)
②0.625÷1.25×8
③(1.7×0.8-0.1)÷0.3
④16.8×101–16.8