Observe the numbers 3, 3, 8 and 8. If you don't change the numbers smoothly, add the operation symbols and form a formula to make the result equal to 27

(3+3÷8)×8=27

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1. Use "add, subtract, multiply and divide" to connect 1, 5, 5 and 5 so that the formula is equal to 24 A mathematical thinking problem, will reward!
2. Write the formula of the result is 24 with four numbers 5,7,7,11 and +, -, *, /, and brackets No, as long as it works
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11. Observe the group of numbers 3 ~ 8, do not change the order of the numbers, add the operation symbols, and make these numbers into a formula, so that the result is equal to 27
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15. 9 11 2 3 how to use addition and subtraction to divide four numbers is equal to 24
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19. Add appropriate budget symbols and brackets to the left of the equal sign of the following questions to make the calculation result exactly equal to the number on the right 3（）3（）3（）3= 5 3（）3（）3（）3= 6 3（）3（）3（）3= 7 3（）3（）3（）3=8 3（）3（）3（）3= 2 3（）3（）3（）3= 4
20. Add appropriate operation symbols and brackets to the left of the equal sign of the following questions to make the calculation result exactly equal to the number on the right 5-5-5-5=0 5○5○5○5=1 5○5○5○5=2 5○5○5○5=3 5○5○5○5=10 5○5○5○5=30 5×5×5×5=100 5○5○5○5=150 Wrong 5○5○5○5=0 5○5○5○5=1 5○5○5○5=2 5○5○5○5=3 5○5○5○5=10 5○5○5○5=30 5○5○5○5=100 5○5○5○5=150