Question

用简便方法计算：57.6×1.6+28.8×36.8-14.4×80

写明过程！

Answer 1

57.6×1.6+28.8×36.8-14.4×80
=28.8×3.2+28.8×36.8-28.8×40
=28.8×(3.2+36.8-40)
=28.8×0
=0

Answer 2

57.6乘以1.6+28.8乘以36.8-14.4乘以80
=57.6(1.6+18.4-20)
=57.6*0=0

Answer 3

57.6×1.6+28.8×36.8-14.4×80
=57.6×1.6+57.6×18.4-14.4×80
=57.6×（1.6+18.4）-14.4×80
=57.6*20—14.4*4*20
=57.6*20-57.6*20
=0

Answer 4

原式=2×28.8×1.6+28.8×36.8-14.4×80
=28.8×(2×1.6+36.8)-14.4×80
=28.8×40-14.4×80
=14.4×2×40-14.4×80
=0

Answer 5

57.6×1.6+28.8×36.8-14.4×80
=28.8*3.2+28.8*36.8-28.8*40
=28.8*(3.2+36.8-40)
=0