(1) 19.28+1.82÷0.7

   =19.28+2.6

   =21.88(2) 10.56×3.75﹣3.75×0.56

  =（10.56﹣0.56）×3.75

  =10×3.75

  =37.5(3)（71.2﹣71.2×0.9）÷0.25

  =（1﹣0.9）×71.2÷

  =7.12×4

  =28.48

(4)14.53﹣（2.64+0.53）﹣1.36

  =（14.53﹣0.53）﹣（2.64+1.36）

  =14﹣4

  =10

(5)13.5÷[（2﹣0.8）×4.5]

  =13.5÷4.5×1.2

  =3×1.2

  =2.5