27.5^2-55*12.5+12.5^2
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27.5^2-55*12.5+12.5^227.5^2-55*12.5+12.5^227.5^2-55*12.5+12.5^227.5^2-55*12.5+12.5^2=27.5^2-2*27.5*1
27.5^2-55*12.5+12.5^2
27.5^2-55*12.5+12.5^2
27.5^2-55*12.5+12.5^2
27.5^2-55*12.5+12.5^2
=27.5^2-2*27.5*12.5+12.5^2
=(27.5-12.5)^2
=15^2
=225
27.5^2-55*12.5+12.5^2
=27.5^2-2*27.5*12.5+12.5^2
=(27.5-12.5)^2
=15^2
=225
27.5^2-55*12.5+12.5^2
=27.5^2-2*27.5*12.5+12.5^2
=(27.5-12.5)^2
=15^2
=225
27.5^2-55*12.5+12.5^2
27.5^2-55*12.5+12.5^2
用简便方法计算：27.5的2次方-55×12.5+12.5的2次方
27.5-55X12.5+12.5 简便计算 ,
用简便方法计算：27.5²-55×12.5+12.5²
27.5的平方-55*12.5+12.5的平方
27.52-55×12.5+12.52
27.5-5x=12.5 解方程
12.5*79+12.5*2-12.5等于
12.5-12.5X0.2的简便算法
简算:12.5*12.5+12.5*6.75
(12.5+x)×2=35
12.5*2递等式计算
12.5×8×12.5×2用简便方法计算?
12.5乘以79加12.5乘以2减12.5简算怎么算
27.52－55×12.5+12.52这题怎么做,
12.5x79+12.5x2-12.5简便算法
8.88*12.5.