(1+0.97+0.215)×(0.97+0.215+0.567)-(1+0.97+0.215+0.567)×(0.97
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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
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
再问: 第1题错的吧
再答: (1+0.97+0.215)x(0.97+0.215+0.567)
-(1+0.97+0.125+0.567)x(0.97+0.215)
=1x(0.97+0.215+0.567)+(0.97+0.215)x(0.97+0.215+0.567)
-1x(0.97+0.215)-(0.97+0.125+0.567)x(0.97+0.215)
=0.97+0.215+0.567-0.97-0.215
=0.567
应该是0.567
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
再问: 第1题错的吧
再答: (1+0.97+0.215)x(0.97+0.215+0.567)
-(1+0.97+0.125+0.567)x(0.97+0.215)
=1x(0.97+0.215+0.567)+(0.97+0.215)x(0.97+0.215+0.567)
-1x(0.97+0.215)-(0.97+0.125+0.567)x(0.97+0.215)
=0.97+0.215+0.567-0.97-0.215
=0.567
应该是0.567
(1)0.99+0.97+0.95+0.93…+0.11+0.9+0.8…+0.2+0.^
0.1+0.3+0.5+0.7.+0.97+0.99=?(列脱式计算)
2.58*99 0.537*101-0.537 2.65-(1.65-0.97) 9.9*9.9+0.99的简便算法
四则混合运算:::48.72/(0.97+1.43)*0.15 32.4-0.75*1.2*0.8+4.1
只要计算,效率 0.97
角钢每米单重换算公式0.00785*{4*(2*20?C4)+0.215*(3.52?C2*1.22)}=1.45其中2
1+0.99-0.98-0.97+0.96+0.95-0.94-0.93+...+0.04+0.03-0.02-0.01
1+0.99-0.98-0.97+0.96+0.95-0.94-0.93+.+0.04+0.03-0.02-0.01=(
0.01+0.02+0.03+0.04+……+0.97+0.98+0.99+1=?
小数加减法的简便计算1+0.99-0.98-0.97+0.96+0.95-0.94-0.93+...+0.04+0.03
1+0.99-0.98-0.97+0.96+0.95-0.94-0.93+…+0.08+0.07-0.06-0.05+0
0.11+0.13+0.15+.+0.97+0.99 简便计算