小学数学竞赛选拔赛初赛试题

2022-03-22 08:21:18   文档大全网     [ 字体: ] [ 阅读: ]

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初赛,选拔赛,竞赛,试题,数学


小学数学竞赛选拔赛初赛试题

(考试时间60分钟)

计算题(只需写出答案,每题5分,共100)

1. 0.1255.57165=

2. 1+11+111+1111+11111+111111+1111111+11111111+111111111+1111111111

=

3. (1+0.37+0.64)(0.37+0.64+1.25) - (1+0.37+0.64+1.25)(0.37+0.64)

=

4. 35.77.3+137.25+4820.27= 5. 371999125168= 6. 84

1813

19.375107= 19198

7. 123456789101112979899100101

=

8. 56789+67895+78956+89567+95678=

9.

227(1)3312

2

(0.25)16

7

232

10. [14.8(31.5)1]8

7255

1




11. 1.44770.0003119.816102.5361.14 12. 91.3+88.8+90.2+270.4+89.8+186.8+91.7 13. 6.258.3716+3.750.8378

41

0.271.252

5814.

11

18.2553

25

15. 199920002000200120012001200119991999200020002000



1111

16. 2000(1)(1)(1)(1)

234100

11111111

17. (1)(1)(1)(1)(1)(1)(1)(1)

22339999100100

=

1232467142191827

18. =

13526107213592745

19. 23.4246.840.53781.250.537846.840.75846.840.1250.5378

= 20. (1



19191919

)(12)(13)(115)= 92929292

2


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