51 and 1 / 4 * 4 / 5 + 41 and 1 / 3 * 3 / 4 + 31 and 1 / 2 * 2 / 3 2013 * 2011 / 2012 + 1 / 2012

RELATED INFORMATIONS

• 1. Simple operation of 31:1 * 3:1 + 41:1 * 4:1 + 51:1 * 5:1
• 2. 31:1 * 3:2 + 41:1 * 4:3 + 51:1 * 5:4 + 61:1 * 6:5 + 71:1 * 7:6
• 3. 31:1 × 3:2 + 41:1 × 4:3 + 51:1 × 5:4 + 61:1 × 6 7 × 8 of 9 and 8 + 6 × 7 of 8 and 7 + 5 × 6 of 7 and 6 + 4 × 5 of 6 and 5
• 4. Find out the law 1, - 2,4, - 8,16, - 32, (), (), ()
• 5. Find rules 5,6,1,7,8,5,3, (), ()
• 6. Eighty one Gongge (Sudoku) 81 Gongge (Sudoku) There are 81 squares, divided into nine blocks, each with 1-9 There are 9 numbers and can't be repeated. The vertical and horizontal numbers in 81 grids are 1-9 respectively Nine numbers cannot be repeated The question is as follows. Who can tell me the answer,
• 7. For an amusement park, 7 children and 2 adults cost 51 yuan, while 20 children and 3 adults cost 114 yuan For the tickets of an amusement park, 7 children and 2 adults need 51 yuan; 20 children and 3 adults need 114 yuan. But if more than 10 children buy tickets together, the children's tickets will be 10% off. How much are the tickets for adults and children before the discount?
• 8. (1×3×11＋2×6×22＋3×9×33)/ 1×2×17＋2×4×34＋3×6×51
• 9. 1 5 10 17 26 the law of these numbers
• 10. Fill in the numbers according to the rules: 2 out of 3 positive, 3 out of 4 negative, 5 out of 6 negative, (), ()
• 11. (1/11+1/20+1/31+1/40）*（1/21+1/30+1/41+1/50)-(1/11+1/21+1/31+1/41+1/51）*（1/21+1/31+1/41)=?
• 12. (111+121+131+141)×(121+131+141+151)−(111+121+131+141+151)× (121+131+141)．
• 13. (1 / 21 + 1 / 31 + 1 / 41) * (1 / 31 + 1 / 41 + 1 / 51) - (1 / 21 + 1 / 31 + 1 / 41 + 1 / 51) * (1 / 31 + 41) 1 / 2)
• 14. Find the rules and fill in the numbers ① 1, 1, 2, 3, 5, 8______ ②0.625，1.25，2.5，5，______ ．
• 15. Derivation of sequence problem Sn = 1 / A1A2 + 1 / a2a3 +. + 1 / Anan + 1 for Sn
• 16. The derivation method of this sequence is The sum formula of the first n terms of the arithmetic sequence {an} is_____ The derivation method is as follows_______ The general formula of equal ratio sequence {an} is_____ The derivation method is as follows_______ The sum formula of the first n terms of the equal ratio sequence {an} is_______ The derivation method is as follows________ I just want to know what the derivation method is, so you just fill in the derivation method
• 17. Sequence derivation 2 3 10 15 26 ( )
• 18. Sequence reasoning 1.-27,-64,-125,（ ） 2.2,12,36,80,（ ） 3.16,8,8,12,24,60,（ ） 4.4,3,2,0,1,-3,（ ） 5.4,11,30,67,（ ） 6.8,10,13,（ ）,25,26 7.24,6,4,（ ）,2,0
• 19. 5. 7, 11, 15, 23 infer according to the sequence law. What's next? A、26 B、27 C、28 D、29
• 20. Find the rule 51.2,64,80100, () don't call me Baidu, because Baidu doesn't have it