1 * 2 * 3 * 4 * 5 * [123 * 123] how to make it the simplest? How can it be completed in one step? Can't use computer

computer

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1. How to calculate 123 × 181 + 123 × 119
2. Xiaohua walked three times on the 60 meter track, 119 steps in the first time, 118 steps in the second time and 123 steps in the third time. How many meters is Xiaohua's average step length? He walked 1500 steps from home to school. How many meters is it from Xiaohua's home to school?
3. Solving binary linear equation x ^ 2 + 25x-123 = 0 I have no calculator
4. Y=123 X=227
5. Solve the equation 2x (X-2) = 54, half X-11 = 29 + Half x 72 - (3-x) = 123
6. To solve the equation 75 + x = 123, both sides of the equation should be () 1. Add 48 2. Subtract 75 3. Add 75
7. 4 (x-0.123) + 7 (y + 3.45) = 1 5 (x-0.123) - (y + 3.45) = 11 solving binary linear equations by substitution method
8. How much is 123 out of 1000?
9. ｛100+123｝/12
10. What is the decimal expression of 123-7 (123 out of seven)?
11. The sum of three continuous natural numbers in the equation is 123. What are the three numbers
12. The sum of the largest and smallest divisors of a number is 123, and this number is 123______ ．
13. Finding all positive integer solutions of equation 123x + 57y = 531
14. Finding all solutions of equation 123x + 57y = 531
15. In the following four items, the legal IP address is (). A.190.220.5 b.206.53.3.78 c.206.53.312.78 d.123, 43, 82220 Please analyze in detail why it is illegal and how to distinguish legitimacy,
16. Given A-B = C and a = 123, B is 3 to 7, then B = (), C = () Sixth grade fill in the blanks, help, urgent!
17. (a+b)(a+c)+123=? You must think about this question, I have urgent need! You must take it out!
18. A / 5 + B / 4 + C / 3 = 0.4 (1) a / 4 + B / 3 + C / 2 = 0.5 (2) a / 3 + B / 2 + C = 1 (3), 123 forms a system of linear equations with three variables to solve a, B and C
19. A = - 123.4 - (- 123.5), B = 123.4-123.5, C = 123.4 - (- 123.5), then () A. c＞b＞aB. c＞a＞bC. a＞b＞cD. b＞c＞a
20. There is a set of data: 42, 44, 44, 46, 48, 48, 48, 50, 51, 51, 56______ The mode is______ ．