1999*3.14+199.9*31.4+19.99*314 简算
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1999*3.14+199.9*31.4+19.99*314 简算
1999*3.14+199.9*31.4+19.99*314 简算
1999*3.14+199.9*31.4+19.99*314 简算
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
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
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
1999×3、14×3
1999*3.14+199.9*31.4+19.99*314 简算
1999*3.14+199.9*31.4-19.99*314的简便运算
1999*3.14 199.9*3.14 19.99*3.14=?怎么简便运算?写出主要运算过程.对不起是1999*3.14+199.9*3.14+19.99*3.14=?
简便计算1999*3.14+199.9*3.13+19.99*314谢谢
1999*3.14+199.9*3.14+19.99*3.14=?怎么样简便运算?写出主要过程.
2000×199.9-1999×199.8
1999+199.9+19.99+1.999 简算
1999+199.9+19.99+1.999+0.1999
1999+199.9+19.99+1.999=?
1999+199.9+19.99+1.999+0.1999
巧算 1.999+19.99+199.9+1999
1999+199.9+19.9+1.9=
简便运算:1999+199.9+19.99+1.999+2.111
1999+199.9+19.99+1.999+2.111简便运算
1999+199.9+19.99+1.999=(简便运算)
简算1999+199.9+19.99+1.999+0.1999
巧算∶1.999+19.99+199.9+1999
2000*199.9-1999*199.8 简便计算