7.09x10.8—0.8x7.09简便计算
49十93X7怎简便计算
简便计算:1.25x0.25x3.2 200.2x7.8-7.8x0.2
1/1x4+1/4x7+1/7x10+1/10x13+1/13X16 简便
用简便方法计算 3.7x2.5+0.3x2.5 0.125x(8+0.8) 1.6x7.8x1.25 解方程 4(x-6
276x7分之2除以27.6 (用简便方法计算)
2.6x7.5÷0.75(用简便方法计算.)
1.6x7.5x1.25等于多少?(简便计算)
5.89x7.6+0.25x58.9-0.589简便计算
用简便方法计算:354x7+360+355+347
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
计算1/1x4+1/4x7+1/7x10+***+1/2007x2010
计算1/1x4+1/4x7+1/7x10+.+1/2002x2005+1/2005x2008