Question

8/19×2/5×57的简便运算？

Answer 1

8/19×2/5×57的简便运算为：
＝8/19×2/5×57
＝8/19×57×2/5
＝8×3×2/5
＝24×2/5
＝48/5
＝9 3/5

Answer 2

8/19*2/5*57
=8/1*2/5*3 19，53约分
=48/5
=9又3/5

Answer 3

8/19x2/5x57
=(8/19x57)x2/5
=(8x3)x2/5
=24x2/5
=48/5
=9.6。