18.9x178.178+0.49-17.8x189.189
18.9x178.178+0.49-17.8x189.189
18.9X178.178+0.49-17.8X189.189=?
18.9x178.178+0.49-17.8x189.189如何简算?
两道简便算法1.199.199X198-198.198X1992.18.9X178.178+0.49-17.8X189.
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
18.9x178,178+0,49-17.8x189.189用简便方法
18.9×178.178+0.49-17.8×189.189
18.9*178.178+0.49-17.8*189.189
18.9*178.178+0.49-17.8*189.18
18.9*178.178+0.49-17.8*189.189简便运算,
简便计算:18.9*178.178+0.49-17.8*189.189