53.87X47-538.7X3.9+5387X0.92=?用简便方法计算
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53.87X47-538.7X3.9+5387X0.92=?用简便方法计算53.87X47-538.7X3.9+5387X0.92=?用简便方法计算53.87X47-538.7X3.9+5387X0.
53.87X47-538.7X3.9+5387X0.92=?用简便方法计算
53.87X47-538.7X3.9+5387X0.92=?用简便方法计算
53.87X47-538.7X3.9+5387X0.92=?用简便方法计算
53.87X47-538.7X3.9+5387X0.92
=53.87X47-53.87X39+53.87X92
=53.87X(47-39+92)
=53.87X100
=5387
53.87X47-538.7X3.9+5387X0.92=?用简便方法计算
先计算,再比较大小.(问题见补充说明)!12x3+12x5/6=()比较大小:12x3+12x5/6()12x23/612x23/6=()11/4x47/7x4/11=()比较大小:11/4x47/7x4/11()11/4x4/11x47/711/4x4/11x47/7=()27x(2/3+4/9)=()比较大小:27x(2/3+4/9)()27x2/3+27x4/927x2/3+27x4
5x+(9-x)x3=35
找规律:一 11,22,33,45,()71二 1,5,16,27,16,()三 2004X(2.3X4.7+2.4)÷(2.4x47-2.3)
198x47的简便计算 综合算式
4/23x47的简便计算法
X3+3X+5=7则3X3+9X-2等于多少
X3 +5X -6
x3+5x-6
用消元法解线性方程X1+2X2+3X3=4 3X1+5X2+7X3=9 2X1+3X2+4X3=5
解线性方程组 X1+2X2+3X3=4 3X1+5X2+7X3=9 5X1+8X2+11X3=14
解线性方程组 X1+2X2+3X3=4 3X1+5X2+7X3=9 5X1+8X2+11X3=14
求齐次线性方程组通解X1-X2+5X3-X4=0X1+X2+4X3+3X4=03X1+X2+9X3+5X4=0
用逆矩阵的方法求解线性方程组{x1-x2-x3=2 2x1-x2-3x3=4 3x1+2x2-5x3=9}
用逆矩阵的方法求解线性方程组 x1-x2-x3=2 2x1-x2-3x3=4 3x1+2x2-5x3=9
X1+X2-3X3-X4=1 3X1-X2-3X3+4X4=4 X1+5X2-9X3-8X4=0 解线性方程组
线性代数,x1+x2-3x3-x4=0 3x1-x2-3x3+4x4=0 x1+5x2-9x3-8x4=0
应用克拉默法则解线性方程组:2X1-X2+3X3=53X1+X2-5X3=54X-X2+X3=9