这两道奥数题怎么做?

2025-02-26 19:42:46
推荐回答(3个)
回答(1):

一、解:8÷(2-1)=8
但是因为在第7天的晚上,小虫已经爬到了离井口1米处,只要在第8天的白天向上爬1米就可以了
所以这只小虫用了8天7夜爬上了井沿
二、第一层x本
x+10+30+x+10+x=200
x=50

回答(2):

1、169 177 186 195 249 258 267 276 285 294 339 348 357 366 375 384 393 429 438 447 456 465 474 483 492 519 528 537 548 559 564 573 582 591 609 618 627 636 645 654 663 672 681 690 708 717 726 735 744 753 762 771 780 807 816 825 834 843 852 861 870 906 915 924 933 942 951 960 63个
2、1和100 2和99、100 3和98、99、100 4和97、98、99、100.........50和51、、、、、、100
1+2+3+4+5+、、、、、+50=1275

回答(3):

16 564 354 564 3564 245

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