Question

63Ⅹ64-21x92用简便方法怎么计算？

Answer 1

解:
63×64-21×92
＝21×3×64-21×92
＝21×（192-92）
＝21×100
＝2100

Answer 2

63X64-21X92
=21X3X4X16-21X4X23
=21X4X(3X16-23)
=21X4X25
=21X100
=2100

Answer 3

63x64-21x92
=21x3x64-21x92
=21x（192-92）
=21x100
=2100

Answer 4

63×64－21×92
＝21×3×64－21×92
＝21×（3×64－92）
＝21×100
＝2100

Answer 5

63×64－21×92
＝21×3×64－21×92
＝21×192－21×92
=21×（192-92）
＝21×100
＝2100