9.9+99.9+999.9+9999.9求巧算
9.9+99.9+999.9+9999.9求巧算
9.9+99.9+999.9+9999.9
=(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)
=11110-0.4
=11109.6
望采纳,谢谢
9.9+99.9+999.9+9999.9巧算怎么算
9.9+99.9+999.9+9999.9
=(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)
=10+100+1000+10000-(0.1+0.1+0.1+0.1)
=11110-0.4
=11109.6
9.9+99.9+999.9+9999.9
9.9+99.9+999.9+9999.9
=(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)
=(10+100+1000+10000)-0.4
=11110-0.4
=11109.6
思维拓展题, 巧算:0.9+9.9+99.9+999.9+9999.9
1+10+100+1000+10000-0.5=11110.5
99.9+999.9+9999.9求过程巧算
100-0.1+1000-0.1+10000-0.1
=11100-0.3
=11099.7
计算9999.9加999.9加99.9加9.9=?
9999.9+999.9+99.9+9.9
=(10000-0.1)+(1000-0.1)+(100-0.1)+(10-0.1)
=11110-0.1x4
=11109.6
9999.9+999.9+99.9+9.9+0.9
你好!
9999.9+999.9+99.9+9.9+0.9=1+10+100+1000+10000-0.1-0.1-0.1-0.1-0.1; =11110.5