18×222.2-666.6
12*222.2-666.6+0.25*0.25*80
12*222.2-666.6+0.25*0.25*80简算
12*222.2+666.6怎么简便计算
怎么简便运算999.999*36+666.6*96
按规律填数.30 6 1.2 ------ 4.5 9 18 ------ 10 4 1.6 ------谢谢了,
计算:-20+(-14)-(-18)-13
递等式 简便运算 222.2/2.22*4.44
222.2×66.66÷3.333怎样简算?
12-(-18)+(-7)-15?
因式分解:ma²-18ma-40m
(i-18%)/(20%-18%)=(20-20.24)/(19.58-20.24)
17/18-5/12等于多少?