33.3-66.6+33.3-(66.6)
33.3-66.6+33.3-(66.6)
66.6乘33.3怎么巧算
33.3×33.3+66.6×66.7+66.7×66.7的简便算法
33.3 乘 66.6 如何口算或简算
利用a÷b等于a/b巧求计算题: (6.4×480×33.3)÷(3.2×120×66.6)
如何简便运算 22.2 33.3 44.4 55.5 66.6 77.7 88.8 99.9=?
99.9乘11.2加15.6乘33.3加66.6乘25.4怎样巧算?急—————————
333×66.6+777×99.9+99.9
9.99*22.2+33.3*3.34
99.9*22.2+33.3*33.4
99.9×22.2+33.3×33.4
33.3%什么意义?