The reduction ratio is 0.4:2.8

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• 1. Simplifying (a ^ 2-2 + 2 ^ - 2) / (a ^ 2-A ^ - 2) is a process. Thank you,
• 2. First simplify, then evaluate: (a + 2) ^ 3 + (1-A) (1 + a), where a = - 3 / 4, the gods help
• 3. 2、 First simplify and then evaluate (a + b) * (a-b) - (a-2b) * (a-b), where a = 2,
• 4. First, simplify, and evaluate: (A-2) (a + 2) - A (A-2), where a = - 1 whole
• 5. 1/2+1/4+1/8+…… +Simple calculation of 512 / 1 + 1024 / 1
• 6. Simple calculation 1 + 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 +... + 1 / 256 =?
• 7. Calculation: (2 + 1) ({2} ^ {2} + 1) ({2} ^ {4} + 1) ({2} ^ {8} + 1)... ({2} ^ {256} + 1)
• 8. 2 / 1 + 4 / 1 + 8 / 1 + ··· + 256 / 1 simple calculation process
• 9. 1 / 2 + 1 / 4 + 1 / 8 +How about 1 / 128 + 1 / 256
• 10. 1 / 2 + 1 / 4 + 1 / 8 +. 1 / 256 how to calculate with simple algorithm
• 11. How to calculate 1 × 2 + 2 × 3 + 3 × 4 + 4 × 5 + 5 × 6 + 6 × 7 + 7 × 8 + 8 × 9 + 9 × 10 + 10 × 11
• 12. (8 / 9 + 1 and 3 / 7 + 6 / 11) / (3 / 11 + 5 / 7 + 4 / 9) simple calculation
• 13. 5 out of 8 × 9 out of 1 × 5 out of 4
• 14. (3 / 4 + 5 / 8) * what can be easily calculated in the calculation of 16 disjunction formula should be simply calculated
• 15. How to calculate 7 / 8 to 3 / 4 to 1 / 8?
• 16. The calculation of [1 - (1 / 4 + 3 / 8)] / 1 / 4 can be simplified and must be simplified
• 17. How to simplify the three out of two Be careful
• 18. 1. Three and one eighth × 7.4 - three and one eighth + 3.6 × 3.25 2. Ten and five quarters - (8.8-5 / 7) + 2 / 7 3. 3.14 × 4.3 + 7.2 × 7 / 3-1.5 × 3.14 4、1/2×3+1/2×3+1/3×4…… +1/2010×2011
• 19. Take off the formula to calculate. (can simple calculate want simple calculate) beg big God urgent 1.4/9 4 / 9 4 / 4 2 8 / 3 / (3 / 8 * 4 / 1) 37 / 2 + 7 / 5 * 25 / 14) / 35 / 34 36x (1 + 4 / 1 + 6 / 1-3 / 1)
• 20. Simplification 27 out of 9; - 30 out of 45