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Primary school to find a rule to fill in the number, simple 2 / 5 4 / 5 1.2 one and three fifths () () 1 1/4 1/9 1/16 1/25 （ ） （ ）
Two, twelve fifths
One in 36, one in 49
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- 1. How to find rules and fill in numbers in primary school (super simple) 1,2,3,10,17,（ ）,（ ）
- 2. There is a big circle in the middle, 10 in it, a small circle in the top, 2 in it, two small circles in the bottom, 3 on the left and 5 on the right. There is a big circle in the middle, 30 in it, a small circle in the top, 3 in it, two small circles in the bottom, 5 on the left and 6 on the right. There is a big circle in the middle, 64 in it, 4 in it, two small circles in the bottom and 6 on the left, The last one on the right is 8. The small circle on the top is 5 inside, and the two small circles on the bottom are 9 on the left and 4 on the right. How about the number of the big circle in the middle of the last one
- 3. Depressed ah, can't do the number of primary school to find the law of the problem! There is a certain rule for each group of numbers below. What is the rule? 1.2,4,12,16,30 2.1,3,9,15,27 3.5,10,20,25,45 4.3,9,15,21,33
- 4. Find the rule: 1,2,4, () 11, () () what number to fill in brackets
- 5. There are string numbers: 1,2,4,7,11,16,22. How many of the first 50 numbers in this string are divided by 3 to 1?
- 6. Mathematical Olympiad number theory 3 In a series of numbers: 1 / 1,1 / 2,2 / 2,1 / 2,1 / 3,2 / 3,3 / 3,2 / 3,1 / 3,1 / 4,2 / 4,3 / 4,4 / 4,3 / 4,2 / 4,1 / 4,1 / 5,..., which fraction is 7 / 10, and what is the 400th fraction?
- 7. There are 16 pieces in a row on the table. Party A and Party B take turns to take at least one piece at a time and at most two pieces at a time. Party A takes the first and who gets the last one is the winner. Q: who can win? What strategy should be adopted to win?
- 8. There is a round table on which Xiaoming and Xiaofang play chess. The rules of the game are: each person gets one chess piece at a time and puts it on the table, and the two people take turns to place it. The chess pieces are not allowed to be covered or overlapped. When there is no more place to put the chess pieces on the table, the game ends. At this time, the last person to place the chess pieces wins, How to place the pieces?
- 9. Natural numbers a and B are not multiples, and their product has nine divisors. The difference between their least common multiple and the greatest common divisor is 224. What is the difference between the two natural numbers?
- 10. Fill in the following numbers: 3, (), 6,90,9,80, (), () Fill in the following numbers: 3, (), 6,90,9,80, (), ()
- 11. Primary school to find the rule to fill in the number 6,1,8,3,10,512,7（）（） 15,16,13,19,11,22（）（）7 1/1.3/4,2/3,5/8,3/5,7/12()() 1,3,8,16,27,41()()
- 12. 1： 3-3 () + 1 () - 2 () + 3 () - 1 () 2： 4-1 () + 0 () + 2 () - 1 () + 3 () 3： 2 + 3 () - 1 () - 2 () - 1 () + 3 () 4： 5-1 () - 2 () + 2 () + 1 () - 1 () Ask () what to fill in and what rules to follow
- 13. Fill in the numbers regularly in grade one 3.4.9.9.15.14. (). 19. ()
- 14. Fill in the numbers in the first grade of primary school
- 15. Find the law
- 16. 150%, 1,3 / 4,60%, (), (), () fill in the regular number, 150%,1,3/4,60%,（ ）,（ ）,（ ） Fill in the numbers regularly First bracket decimal, second bracket fraction, third bracket percentage
- 17. Find the rule: 2 / 3 1 / 2 2 / 5 1 / 3 2 / 7 1 / 4
- 18. Find the rule and fill in the numbers. 90,1,75,17,60,33, (), () ()
- 19. (- 0.5) - (3 and 1 / 4) + 6.75-5 and 1 / 2,
- 20. 16×（6.75÷512-2.4+414×225）-118-0.875．