(7.8乘4.8乘7.5）除以（3.9乘2.4乘1.5）简算.
问题描述：
(7.8乘4.8乘7.5）除以（3.9乘2.4乘1.5）简算.
答
(7.8*4.8*7.5)/(3.9*2.4*1.5)=2*2*5=20
答
(7.8x4.8x7.5)/(3.9x2.4x1.5)
=(3.9x2x2.4x2x1.5x5)/(3.9x2.4x1.5)
=2x2x5
=20
答
(7.8x4.8x7.5)/(3.9x2.4x1.5)
=（7.8/3.9)x(4.8/2.4)x(7.5/1.5)
=2x2x5
=20