- 0.6546*3.6 36*3.544的简便方法
- 简便计算:2012.25*2013.75-2010.25*2015.75
- 123456789*987654321-123456788*987654322=多少简便计算脱式
- 2004.05*1.99705-2001.05*1999.05简算
0.6546*3.6 36*3.544的简便方法
0.6546*3.6 36*3.544的简便方法
3.6*48+520*0.36
=3.6*48+52*3.6
=3.6x(48+52)
=360
简便计算:2012.25*2013.75-2010.25*2015.75
原式版权
=(2010.25+2) x 2013.75 - 2010.25 x 2015.75
=2010.25 x 2013.75 + 2 x 2013.75 - 2010.25 x 2015.75
=2010.25 x( 2013.75 - 2015.75) + 2 x 2013.75
= 2 x 2013.75- 2 x 2010.25
=2 x 3.5
=7
123456789*987654321-123456788*987654322=多少简便计算脱式
123456789*987654321-123456788*987654322=(123456788+1)*987654321-123456788*(987654321+1)
=987654321-123456788
=864197533
2004.05*1.99705-2001.05*1999.05简算
2001.05*1999.05-2004.05*1996.05
=(2000.05+1)*(2000.05-1)-(2000.05+4)*(2000.05-4)
=2000.05²-1-2000.05²+16
=-1+16
=15
标签: #简便