19.99*37+1999*0.82-1999.9*1.9=
计算:20.11×37-201.1×1.9+2011×0.82=
计算:19.98×37-199.8×1.9+1998×0.82=______.
20.09×37+200.9×1.9+2009×0.82简算
20.12×37-201.2×1.9+2012×0.82
1.9+19.9+199.9+1999.9+19999.9=?
1999+199.9+19.99+1.999=?
1999+199.9+19.99+1.999=(简便运算)
1999*3.14 199.9*3.14 19.99*3.14=?
20.09*37-200.9*1.9+2009*0.82怎样简算?
20.09*37-200.9*1.9+2009*0.82 简便算法
20.02*37-200.2*1.9+2002*0.82 简便计算
20.08×37-200.8×1.9+2008×0.82简便算法