(1+0.23+0.34)×(0.23+0.34+0.56)-(1+0.23+0.34+0.56)×(0.23+0.34) 5
3个回答
2014-08-29
展开全部
等于0.56
简便算法:
原式=1x(0.23+0.34+0.56)+(0.23+0.34)x(0.23+0.34+0.56)-1x(0.23+0.34)-(0.23+0.34+0.56)x(0.23+0.34)
=1x(0.23+0.34+0.56)-1x(0.23+0.34)+(0.23+0.34)x(0.23+0.34+0.56)-(0.23+0.34+0.56)x (0.23+0.34)
=1x(0.23+0.34)-1x(0.23+0.34)+1x0.56+(0.23+0.34)x(0.23+0.34+0.56)-(0.23+0.34+0.56)x (0.23+0.34)
=0.56
因式分解的联系题,学习进步哦!
加油!
简便算法:
原式=1x(0.23+0.34+0.56)+(0.23+0.34)x(0.23+0.34+0.56)-1x(0.23+0.34)-(0.23+0.34+0.56)x(0.23+0.34)
=1x(0.23+0.34+0.56)-1x(0.23+0.34)+(0.23+0.34)x(0.23+0.34+0.56)-(0.23+0.34+0.56)x (0.23+0.34)
=1x(0.23+0.34)-1x(0.23+0.34)+1x0.56+(0.23+0.34)x(0.23+0.34+0.56)-(0.23+0.34+0.56)x (0.23+0.34)
=0.56
因式分解的联系题,学习进步哦!
加油!
展开全部
设0.23+0.34为x,则
原式=(x+1)(x+0.56)-(x+1+0.56)×x
=(x²+0.56x+x+0.56)-(x²+0.56x+x)
=0.56
原式=(x+1)(x+0.56)-(x+1+0.56)×x
=(x²+0.56x+x+0.56)-(x²+0.56x+x)
=0.56
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原式
=1.57x1.13-2.13x0.57
=0.56
=1.57x1.13-2.13x0.57
=0.56
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