19.2÷2.4x3.2 =8×3.2=25.612.5x0.33x0.5 =4.125×0.5=2.062514.3÷1.1-18=13-18=-53.2x2.4+3.2x7.6=3.2x（2.4+7.6）=3.2x10=32
