3.14-6.28+9.42-12.56+15.7-18.84+-17.1简便方法怎么做
问题描述:
3.14-6.28+9.42-12.56+15.7-18.84+-17.1简便方法怎么做
答
3.14-6.28+9.42-12.56+15.7-18.84+(-17.1)
=3.14(1-2+3-4+5-6)+(-17.1)
=3.14×(-3)+(-17.1)
=-9.42+(-17.1)
=-26.52