Question

18.9-4.6x2.4简便计算？

Answer 1

18.9-4.6x2.4简便计算？
= 18.9－（5-0.4）×2.4
=18.9－5×2.4+0.4×2.4
=18.9-12+0.96
=6.9+0.96
=7.86

Answer 2

18.9-4.6×2.4
=18.9-4.6×(2.5-0.1)
=18.9- 4.6×2.5+4.6×0.1
=18.9-11.5+0.46
=7.86

Answer 3

解:已知18.9-4.6×2.4可以写成18.9-4.6×2.5-4.6×0.1＝18.9-11.5-4.6，即7.4-4.6＝2.8。因此，18.9-4.6×2.4的简便计算为18.9-4.6×2.5-4.6×0.1＝18.9-11.5-4.6＝7.4-4.6＝2.8。

Answer 4

关于算式18.9-4.6×2.4进行简便的解答，具体的计算步骤如下：
18.9-4.6×2.4
=18.9-4.6×6×0.4
=18.9-27.6×0.4
=18.9-11.04
=7.86

Answer 5

18.9-4.6×2.4
＝18.9-5×2.4+0.4×2.4
＝18.9-12+0.96
＝6.9+0.96
＝7+0.96-0.1
＝7.96-0.1
＝7.86