五年级计算竞赛试题

汗～～～

这是巧算题吧

9999*16+3333*52

=9999*16+3333*51+3333

=10000*16-16+10000*17-17+3333

=160000+170000+3300

=333300

0.18*6+0.1818*6+0.181818*6

=0.18*6+0.18*6+0.0018*6+0.18*6+0.0018*6+0.000018*6

=0.18*18+0.0018*12+0.000018*6

=0.2*18-0.02*18+0.002*12-0.0002*12+0.000018*6

=3.6-0.36+0.024-0.0024+0.000108

=3.261708

1234*92+1234*992-1234*84

=1234*（92+992-84）

=1234*1000

=12341000

221*220/17-209*208/19

=（221/17）*220-（209/19）*208

=13*220-11*208

=13*20*11-11*208

=11*（13*20-208）

=11*52

=572

14814818*2006

=14800000*2006+14800*2006+18*2006

=1500000*2006-200000*2006+15000*2006-200*2006+18*2006

=3009000000-501200000+30090000-501200+2006+16048

=29718524928

200620062006/18

=100310031003/9

=114555900 余3