Question

4/15×20/16×40/9的简便计算？

4/15×21/16×40/9的简便计算

Answer 1

4/15X20/16X40/9
=15X20/4X40/9
=15X5X40÷9
=15÷9X5X40
=5 ÷3X5X40

=1000÷3
=333.3

Answer 2

=(4×20×40)/(15×16×9)
=4/16×20/15×40/9
=1/4×4/3×40/9
=1/3×40/9
=40/27

Answer 3

4/15*20/16*40/9
=4/15*5/4*40/9
=1/3*40/9
=40/27

Answer 4

4/15x20/16x40/9
（4/15）x（5/4）x（40/19）
＝（1/3）x（40/9）
＝40/27

Answer 5

4/15x20/16x40/9
=4/15x5/4x40/9
=5/15x40/9
=1/3x40/9
=40/27