Question

用递等式和简便方法计算

问题：8.54-5.96要用递等式和简便方法，要快

Answer 1

8.54-5.96
=8.5+0.04-(6-0.04)
=8.5+0.04-6+0.04
=8.5-6+(0.04+0.04)
=2.5+0.08
=2.58

追问

这像是小学四年级写的么.......

追答

8.54-5.96
=8.54-(6-0.04)
=8.54-6+0.04
=2.54+0.04
=2.58