Question

0.52×19.8的简便运算怎么写？

Answer 1

0.52×19.8
=0.52×（20-0.2）
=10.4-0.104
=10.392

Answer 2

0.52x19.8
=0.52x（20-0.2）
=0.52x20-0.52x0.2
=10.4-0.104
=10.396

Answer 3

＝0.52×（20-0.2）＝0.52×20-0.52×0.2＝10.4－0.104＝10.286

Answer 4

0.52*19.8
=0.52*(20-0.2)
=0.52*20-0.52*0.2
=10.4-0.104
=10.296

Answer 5

原式=5.2×（2-0.02）；
=5.2×2-5.2×0.02；
=10.4-0.104；
=10.296