Question

1.18x0.59-0.059x0.18用简便方法？

Answer 1

原式等于1.18×0.59-0.59×0.18
=0.59×（1.18-0.18）
=0.59×1
=0.59

Answer 2

1.18x0.59-0.059x0.18
＝1.18x0.59-0.59x0.018
＝
0.59x（1.18-0.018）
＝0.59x1.162
＝（0.6-0.01）x1.162
＝0.6x1.162-0.01x1.162
＝0.6972-0.01162
＝0.68558