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24.24×36+2.424×16+0.2424×47+24.24等于多少,简便计算?

24.24×36+2.424×16+0.2424×47+24.24等于多少,简便计算?

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