1999*3.14+199.9*31.4+19.99*314 简算
问题描述：
1999*3.14+199.9*31.4+19.99*314 简算
答
1999×3、14×3
答
1999*3.14+199.9*31.4+19.99*314 =1999*3.14+199.9*10*3.14+19.99*100*3.14=1999*3.14+1999*3.14+1999*3.14=1999*3*3.14=18830.58
答
1999*3.14+199.9*31.4+19.99*314
=1999×3.14+1999×3.14+1999×3.14
=1999×3.14×3
=（2000-1）×9.42
=18840-9.42
=18830.58
答
1999×3.14+199.9×31.4+19.99×314
=1999×3.14+1999×3.14+1999×3.14
=1999×3.14×3
=18830.58