(1+0.97+0.215)×(0.97+0.215+0.567)-(1+0.97+0.215+0.567)×(0.97+0.215)求这道题的简便运算?还有1题目求简便运算,如下;2004×2004+2003×2003-2004×2003-2003×2002
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(1+0.97+0.215)×(0.97+0.215+0.567)-(1+0.97+0.215+0.567)×(0.97+0.215)求这道题的简便运算?还有1题目求简便运算,如下;2004×2004+2003×2003-2004×2003-2003×2002
(1+0.97+0.215)×(0.97+0.215+0.567)-(1+0.97+0.215+0.567)×(0.97+0.215)
求这道题的简便运算?
还有1题目求简便运算,如下;
2004×2004+2003×2003-2004×2003-2003×2002
(1+0.97+0.215)×(0.97+0.215+0.567)-(1+0.97+0.215+0.567)×(0.97+0.215)求这道题的简便运算?还有1题目求简便运算,如下;2004×2004+2003×2003-2004×2003-2003×2002
(1+0.97+0.215)*(0.97+0.215+0.567)-(1+0.97+0.215+0.567)*(0.97+0.215)=(0.97+0.215)*(0.97+0.215+0.567)+1*(0.97+0.215+0.567)-(0.97+0.215+0.567)*(0.97+0.215)-1*(0.97+0.215)=(1-0.97-0.215)*(0.97+0.215+0.567)+(0.97+0.215-1)*(0.97+0.218+0.567)=0
2004*2004+2003*2003-2004*2003-2003*2002
=2004*2004-2004*2003+2003*2003-2003*2002
=2004*(2004-2003)+2003*(2003-2002)
=2004*1+2003*1
=2004+2003
=4007
都是提公因式,整体法和拆数法过程把0.97+0.215看成整体就可以了,直接等于0.567;把2004x2004变成2004x(2003+1),后一个式子类似,最后直接变成2004+2003=4007能把算式写出来吗,要详细的(1+X)(X+0.567)-(1+X+0.567)X=0.567;2004x(2003+1)+2003x(2002+1)-2004x2003-2003x2002=2004+...
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都是提公因式,整体法和拆数法
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