=(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