How much is 8 out of 15 minus 1 out of 13?

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• 1. 32+54+98+1716+… +257256．
• 2. What is 3-2.15 of 9 and 8 + 0.625-4 and 17 of 20
• 3. According to the law of the first three formulas, the last formula is supplemented completely. 8 ★ 2 = 8 + 9 = 17 & nbsp; & nbsp; & nbsp; & nbsp; 5} 3 = 5 + 6 + 7 = 18 & nbsp; & nbsp; & nbsp; & nbsp; 4} 6 = 4 + 5 + 6 + 7 + 8 + 9 = 3911} 4=______ =______ ．
• 4. 1 and 1 / 3 * (- 4 / 9) * [(- 2.5) + (- 25 / 3)] And (- 3) ^ 2 (3 / 2) ^ 2 * 2 / 9 + 6 | - 2 / 3 | ^ 2
• 5. 8 and 4 / 5 △ [87 + 0.625 × (2 and 3 / 4-1.15)] can be simple
• 6. How about 0.625 * 5.8 + 5 / 8 * 3.2 + 5 / 8
• 7. If 1 = 5, 2 = 25, 3 = 125, 4 = 625, what is 5 equal to?
• 8. If 1 = 5,2 = 25,3 = 125,4 = 625,5=
• 9. If 1 = 5, 2 = 25, 3 = 125, 4 = 625, then 5 =?
• 10. How much is grade 5? It seems to hurt people, but I still can't guess,
• 11. 10 / 24 () = 15: () = ()% = 0.625
• 12. 【 】÷24＝0.625＝25÷【】＝15：【】
• 13. For a three digit number, its ten digit number is eight times larger than its hundred digit number and six times larger than its single digit number. What is the three digit number?
• 14. How many digits is 256 ^ 5 × 625 ^ 10?
• 15. There is a two digit number. The sum of the ten digit number and the single digit number is 8 If the number on the ten digit and the number on the single digit are exchanged, the two digits obtained will be multiplied by the original two digits, and 1855 will be obtained
• 16. A three digit, ten digit is eight times of a single digit and four times of a hundred digit. What is the three digit
• 17. 9.7 + 3 / 8 + 0.625 + 3 / 10
• 18. (+ 16) + (- 29) + (- 9) + (- 11) + (+ 9) - 3.2 + 5 and 4 / 7 - 6.8 - 5 and 4 / 7
• 19. 【1.25×7＋1.25-3.7】 ,【5.76×1.1＋57.6×0.89】 ,【36×2.54＋1.8×49.2】 Simple and convenient
• 20. 50% of a number is 3% less than 7% of 8. What's the number?