=(0.8× 12.5)×(0.04×25)
= 10× 1
= 10
(2) 16.08×0. 125
=8×2.0 1×0. 125
=8×0. 125×2.0 1
= 1×2.0 1
=2.0 1
(3)99×73.2+73.2
=99×73.2+ 1×73.2
=(99+ 1)×73.2
= 100×73.2
=7320
(4)29.36÷ 12.5÷0.8
=29.36÷( 12.5×0.8)
=29.36÷ 10
=2.936
(5)4.27÷28.6×3.59÷42.7×2.86÷35.9
=(4.27÷42.7)÷(28.6÷2.86)×(3.59÷35.9)
=0. 1÷ 10×0. 1
=0.00 1