2.2*(-2.1)+1.21*4.2-2.1*0.22简算!
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2.2*(-2.1)+1.21*4.2-2.1*0.22简算!
2.2*(-2.1)+1.21*4.2-2.1*0.22简算!
2.2*(-2.1)+1.21*4.2-2.1*0.22简算!
2.2*(-2.1)+1.21*4.2-2.1*0.22
=-2.2*2.1+1.21*4.2-2.1*0.22
=-2.2*2.1+1.21*2*2.1-2.1*0.22
=-2.2*2.1+2.42*2.1-2.1*0.22
=2.1*(-2.2+2.42-0.22)
=2.1*0
=0
2.2*(-2.1)+1.21*4.2-2.1*0.22
=-2.2*2.1+1.21*4.2-2.1*0.22
=-2.2*2.1+1.21*2*2.1-2.1*0.22
=-2.2*2.1+2.42*2.1-2.1*0.22
=2.1*(-2.2+2.42-0.22)
=2.1*0
=0
2.2*(-2.1)+1.21*4.2-2.1*0.22简算!
10.1^2-10.1*2.2+1.21简便运算
利用因式分解计算:10.1^2-10.1*2.2+1.21利用因式分解计算:10.1^2-10.1*2.2+1.21
3.5+2.1x=4.2,
3.5*4.2/(0.35*2.1)
2.2.4.2.算24点
因式分解:10.1的平方-10.1乘以2.2+1.21
一组数字怎么算规律 规律方法是什么2.1.2.1.1.1.2.2.2.1.1.1.1.1.1.2.2.2.1.2.2.2.2.2.2.2.1.2.1.2.1.2.2.1.2.1.1.2.1.1
7.8乘以4.2加2.2乘以4.2等于(7.8+2.2)乘以4.2这是根据( )简算
3.8+4.29+2.1+4.2怎么简便计算
简便算法计算3.8+4.29+2.1+4.2
第三题 A(2.1)B(2.2)
3.8+4.29+2.1+4.2 能简算的要简算 3.8+4.29+2.1+4.2
3.63除以(2.1+0.32)乘0.35怎么简便计算?1.21 怎么得来?
2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算
2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算
2.1×1.1×0.54÷(5.4×1.21÷5/21)=多少?
解方程;4.2X-2.5-1.9X=2.1