-9+12÷(-6)-(-4)×(-4)÷(-8)

The original formula = - 9-2 - (- 2) = - 9, multiply and divide first, then add and subtract

RELATED INFORMATIONS

1. 3 / 4 = 6 / 8 = 9 / 12 = several
2. Find the rule and fill in the appropriate number in the brackets. (1) 45, 25, 15______ ，120，______ ，______ ．（2）12，34，98，2716，______ ，______ ．
3. Fill in the brackets with the appropriate number 4 / 1 9 / 1 16 / 1 () (). 2 / 1 6 / 1 12 / 1 20 / 1 30 / 1 () ()
4. 1 / 9 2 / 27 1 / 27 () what do you fill in the brackets? It's a question for civil servants
5. Fill in according to the rules: 2 1 4 3 6 9 8 27 () () what should be filled in the brackets?
6. Find the rules: 2, 3, 4, 9, 8, 27, (). What do you fill in the brackets?
7. A series of numbers (1,1,1); (2,4,8); (3,9,27); (4,16,64) The sum of the three numbers in the tenth bracket is ()
8. Take off formula calculation (those that can be simplified should be simplified) ① (1 / 27-1 / 36) △ 1 / 9 ② 8 / 23-9 △ 5 / 6 × 3 / 16
9. Calculate the following questions (1) 763 + 298 (2) 0.25 * 0.25 * 16 (3) 19.9 * 99 + 19.9 (4) 22 / 23
10. （5）8.6×2.7+3.5×1.6 （6）(0.19×5.4＋2.6×0.19)×12.5 （7）9.99×2.22+3.34×3.33 (8) What is the sum of 1.2 divided by the quotient of 4.2 and the product of 5 and 6.02? Multiple simple operations
11. 2＝2＝1×2 2+4＝6＝2×3 2+4+6＝12=4×5 2+4+6+8=20=4×5 . 1. We can guess what is the sum of continuous even numbers from 2 to n (n is a natural number)? 2. When n = 10, what is the sum of continuous even numbers from 2 to the tenth?
12. Starting from 2, continuous even numbers are added, and the sum is as follows: 2 + 2 = 2 × 22 + 4 = 6 = 2 × 32 + 4 + 6 = 12 = 3 × 42 + 4 + 6 + 8 = 20 = 4 × 5 (1) What is the sum of N consecutive even numbers from 2? (2) Take n = 6 to verify whether the conclusion of (1) is correct
13. 8 / 3 = 30 = 24 / 3 = 4 / 3
14. (): 24 = 3 / 8 = 12 divided by () = () 24 / 8
15. (): 24 = 3 / 8-12 divided by () = 30 ()
16. Two percent plus one sixth plus one twelfth plus one twentieth What's one in 110?
17. One out of two plus one out of six plus one out of twelve plus one out of twenty plus one out of thirty
18. How much is half plus five sixths plus eleven twelfth plus nineteen twentieth? It must be a simple calculation and try not to divide
19. 12+56+1112+1920+2930+… +97019702+98999900．
20. 12+56+1112+1920+… +98999900=______ ．