（1）（24-8.4×1.5）+5.3 =（24-12.6）+5.3 =11.4+5.3 =16.7 答：得16.7． （2）（2.7+4.5）÷12×0.3 =7.2÷12×0.3 =0.6×0.3 =0.18 答：积是0.18．
