Question

1.18x0.59—0.059x0.18简便方法？

Answer 1

1.18x0.59-0.59x0.18
=(1+0.18)x0.59-0.59x0.18
=0.59+0.18x0.59-0.59x0.18
=0.59+0.18x(0.59-0.59)
=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
=0.6972-0.01162
=0.68558