用递等式如何计算4.5*3.6+5.5*0.34,_数学解答

用递等式如何计算4.5*3.6+5.5*0.34,

人气：240 ℃　时间：2020-01-25 08:05:00

解答

4.5*3.6+5.5*0.34
=4.5*3.6+0.55*3.4
=4.5*3.6+0.5*3.4+0.05*3.4
=4.5*3.6+0.5*3.6-0.5*0.2+0.5*0.34
=5*3.6+0.5(0.34-0.2)
=10*1.8+0.5*0.14
=18+1*0.07
=18.07