1-2-3+4+5-6-7+8+9-10…… +97-98-99+100=? Ask for the answer and write the process

RELATED INFORMATIONS

• 1. 1+2-3+4+5-6+7+8-9+.+97+98-99+100=?
• 2. 1 / 2 + 2 / 3 + 3 / 4 +99 / 100 =?
• 3. (99 and 14 / 15) * 12
• 4. 1 / 3 + 1 / 15 + 1 / 35 + 1 / 63 + 1 / 99 + 1 / 143 + 1 / 195 It should be easy to understand
• 5. Under what circumstances is one plus one equal to 99?
• 6. Factorization: 9999 * 2-1111 times 27 divided by 102 times 98 cry for help
• 7. All by factorization 3x [X-1] = 2 [1-x] [x + 1] ^ 2-25 = 0 16 [X-2] ^ 2 = 9 [x + 3] ^ 2
• 8. The factorization shows that 8 times of 64 minus 9 times of 32 minus 22 times can be divided by 26 If a polynomial is divided by (X-Y) and the result is 4-x & sup2;, then the polynomial can be decomposed into a factor（
• 9. Try to explain (a + 3) &# 178; ≠ A & # 178; + 3 & # 178; (a ≠ 0) in a direct way
• 10. 300 × 200-10 π & # 178; =? (calculation retention π)
• 11. At 1, 2, 3 The algebraic sum of a plus sign or a minus sign is______ (fill in odd or even numbers)
• 12. Add "+" or "-" before the numbers 3, 4, 5, 6, 7, 8 and 9 to make their sum - 10. Please come up with two solutions
• 13. 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
• 14. 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
• 15. 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
• 16. In 1-2000, there are several numbers that are divided by 3,5,7 to make 1
• 17. 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?
• 18. Fill in the appropriate sign to make the equation hold: 1 2 3 4 5 6 7 8 9 = 1000
• 19. Use 1.2.5.6.8.9 to combine equations with three or four symbols equal to 5
• 20. 1 / 2 1 / 2 1 / 2 1 / 2 = 3