用简便算法计算:199.199X198-198.198X199 18.9x178.178+0.49-17.8X189.1
用简便算法计算:199.199X198-198.198X199 18.9x178.178+0.49-17.8X189.1
用简便方法做 199.199x198-198.198x199 18.9x178.178+0.49-17.8x189.18
两道简便算法1.199.199X198-198.198X1992.18.9X178.178+0.49-17.8X189.
18.9x178.178+0.49-17.8x189.189
18.9x178,178+0,49-17.8x189.189用简便方法
18.9X178.178+0.49-17.8X189.189=?
18.9x178.178+0.49-17.8x189.189如何简算?
98x199用简便方法怎么计算,
用简便方法计算怎么写85x199+85
用简便方法计算.85x199+85 = = =
用简便算法计算
1、简便计算7.5x23+31x2.50.79x0.46+7.9x0.24+11.4x0.079199.199x198-