7.5×8.88+2.22×7.5+2.5×11.1= 【简便运算,

7.5×8.88+2.22×7.5+2.5×11.1= 【简便运算, 8.15-3.78-2.22,4.5+5.87-6.23,64+7.5+2.5,17.75+0.8-9.87,4.76+5.87-2. 7.5-x=2. 7½×8.88+2.22×7.5+2½×11.1简便运算一又二千零九分之一*3.6+三又五分之三*八又二千零九分之二千零八2009½×2009½-2008½×2008½2/1×3＋2/3×5＋2/5×7···＋2/21×232009/2010×2001=2009/2010＋ 1.156×157.157-157×156.1562.（8.88+8.88+8.88+8.88）×1.253.（6.4×7.5×8.1）÷（3.2×2.5×2.7）4.20.86÷12.5+0.8÷12.5-9.16÷12.5 7.5-2.45+7.5+2.45 X分之7.5=12分之2. 75*4.67+52.3*7.5+7.5 7.5×6.1÷7.5×6. 7.5除以2.5+7.5除以7.5 简便计算的过程 7.5*3.8+7.5+7.5*5.2用乘法分配律怎算 数学题递等式题!2.22×3.6+8.88×1.6怎样简便就怎样算 7.5乘7.5乘3.14等于几 7.5+2.35-7.5+2.5的简便计算 7.5*15.3+7.5*3.7-75简便运算 8.25X-7.5=7.5X 简便计算 2.5+7.5-2.5+7.5 12除以7.5减去7.5除以12