1 / 2 1 / 2 1 / 2 1 / 2 = 3

RELATED INFORMATIONS

• 1. Use 1.2.5.6.8.9 to combine equations with three or four symbols equal to 5
• 2. Fill in the appropriate sign to make the equation hold: 1 2 3 4 5 6 7 8 9 = 1000
• 3. There is a column of numbers 7,2,3,1,6,5,2,3,1,6,5,2,3,1,6,5. What is the number 2000? What is the sum of the first 2000?
• 4. In 1-2000, there are several numbers that are divided by 3,5,7 to make 1
• 5. 1 2 3 4 () 6 7 8 9 what to fill in and why In fact, to be good at observation, we should fill in a sign that is.. 1234 ＜6789
• 6. Add appropriate operation symbols between the numbers 1.2.3.4.5.6.7.8 to get 1 1（）2（）3（）4（）5（）6（）7（）8=1
• 7. 5 () 5 () 5 () 5 () 5 = 1. Fill in the operation symbol in the bracket (bracket can be added) There are several more questions: 5 5 5 5 5=2 5 5 5 5 5=3 5 5 5 5 5=4
• 8. Add "+" or "-" before the numbers 3, 4, 5, 6, 7, 8 and 9 to make their sum - 10. Please come up with two solutions
• 9. At 1, 2, 3 The algebraic sum of a plus sign or a minus sign is______ (fill in odd or even numbers)
• 10. 1-2-3+4+5-6-7+8+9-10…… +97-98-99+100=? Ask for the answer and write the process
• 11. One half, one third, one sixth, sign to make the result 2 If you ask someone no, you can change the position of the number. You can use +, -, *, /, and brackets,
• 12. Half a quarter an eighth a sixteenth fill in the operation symbol how to get 2 If you don't change your position, it's urgent
• 13. If "!" Is a mathematical operation symbol, and 1! =1，2！ =2×1，3！ =3×2×1，4！ =4×3×2×1… . find the value of 100! 98
• 14. If "1" is an operation symbol, and 1! = 1; 2! = 2x1; 3! = 3x2x1; 4! = 4x3x1 Then the value of 100! △ 99! Is?
• 15. Simple operation: (1 + 3 + 5 +...) +1999)-(2+4+6+… +How to do it?
• 16. Limx tends to be 1 (the difference between radical X and 1) / (the difference between (3 + x) and (2)
• 17. How to calculate the area of paint door
• 18. How to calculate the area inside the suit
• 19. How to square a door
• 20. How to improve the ability of mathematical calculation There are serious problems in calculation. The calculation speed is very slow and easy to make mistakes. There is always a hint in my heart every time I take the exam. I know that the calculation is going to make mistakes. When I get a question, I will be confused even if I see a very simple exponential operation. It's easy to make mistakes in solving equations, and the plus and minus signs are often written wrong, Decimal division takes half a day. Am I useless? Alas, I'm not afraid of doing problems. I just think I'm too stupid. Sometimes I really think I'm not the material of mathematics. Alas, I'm really helpless and desperate. So I'd like to ask you for some specific methods, such as some accurate calculation skills. Thank you very much! There are physical and chemical quite a headache ah, the exam always want to come over!