Question

64.6ⅹ38.2+646ⅹ6.08+64.6的简便计算？

Answer 1

=646x3.82+646x6.08+646x0.1
=646x(3.82+6.08+0.1)
=646x10
=6460

Answer 2

原式＝64.6×38.2+64.6×10×6.08＋64.6×1
＝64.6×38.2＋64.6×60.8＋64.6×1
＝64.6×（38.2+60.8+1）
＝64.6×100
＝646