How to calculate 24 o'clock from 3, 7, 1 and 8? I solved (7-3-1) * 8

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• 1. How to make 2,7,8,11 into a formula by using operation symbols and adding brackets to make the result equal to 24?
• 2. 1. Add operation symbol to make 3 = 24 The order cannot be reversed
• 3. 5 = {1 -- 10} add symbols between them to make the answers get 1,2,3,4,5,6,7,8,9,10! Move your head!
• 4. 8 4 3 = 24 add sign and bracket to form formula
• 5. Please add appropriate operation symbols to make the operation result 24. - 4,3,8,1
• 6. Finding the general formula of 1,2,3,5,7,10,13,17,21 Find 1,3,5,10,16,24,37,53 Find 1,3,6,10,17,26,41,61 General term formula
• 7. 1,2,5,10,17 I know the answer!
• 8. 2 / 3, - 1,10 / 7, - 17 / 9,26 / 11?
• 9. What are the general formulas of 1,2,5,10,17,26 and 1,3,7,13,21?
• 10. What is the general formula of 1,3,7,13,21 What is the general formula of 1,3,7,13,21,31
• 11. What symbol does 9999 use to calculate 24 points
• 12. Fill in the appropriate operation symbols and brackets on the horizontal line to calculate "24 points" - 4_____ 6 _____ （-3) _____ 2=24
• 13. 24 points: [the given four numbers, the use of "+. -. X. /" and multiplication square operation symbols and brackets, you can disorder the order, the calculated number is equal to 24] 《 4 5 7 9 》 《 3 7 8 8 》 《 2 2 8 8 》 《 3 3 7 7 》 《 1 3 5 7 》 《2 3 6 9》
• 14. 5 = {1 -- 10} add symbols between them to make the answers get 1,2,3,4,5,6,7,8,9,10! （5＋5）÷5－5÷5＝1 （5＋5）÷5＋5－5＝2 （5＋5）÷5＋5÷5＝3 5＋5－5÷5－5＝4 5×5－5×5＋5＝5 5＋5÷5－5＋5＝6 （5÷5＋5）＋5÷5＝7 （5＋5＋5）÷5＋5＝8 （5×5－5）÷5＋5＝9 （5×5＋5×5）÷5＝10 5 x5 x5 x(5 -5)=0 5 ÷5 +5 x(5 -5)=1 (5+ 5)÷ 5 +5 -5=2 5÷5+( 5+5)÷5=3 (5 +5+ 5+ 5)÷ 5=4 5 x5÷ 5+ 5- 5=5
• 15. (1.992) * (1.992) * (19.922) = 1992 with operation symbol filled in the middle
• 16. Fill in the number in ×, and the operation symbol in × (□ ×) × 19 = 8 × (25 × 9)
• 17. Fill in the operation symbol between 9 2, and the result is 1000
• 18. What are the operation symbols to be filled in when the last four equals nine
• 19. How to fill in the operation symbol for 4 = 5
• 20. 4 () 4 () 4 = 4