4 Calculation questions Zero - half - (minus three fourths) + (minus five sixths) - two thirds |Negative two and a half | - (- 2.5) + 1 - | - 1-two and a half| 13-[26-（-21）+（-18）] [1.4-（-3.6+5.2）-4.3]-（-1.5） We need a process. Thank you

4 Calculation questions Zero - half - (minus three fourths) + (minus five sixths) - two thirds |Negative two and a half | - (- 2.5) + 1 - | - 1-two and a half| 13-[26-（-21）+（-18）] [1.4-（-3.6+5.2）-4.3]-（-1.5） We need a process. Thank you

1: Original formula = 0-1 / 2 - (- 3 / 4) + (- 5 / 6) - 2 / 3 = - 1 / 2 + 3 / 4-5 / 6-2 / 3 = 1 / 4-5 / 6-4 / 6 = 1 / 4-3 / 2 = - 4 / 52: original formula = 2.5 + 2.5 + 1 - | 1-2.5 | = 6-1.5 = 4.53:13 - [26 - (- 21) + (- 18)] = 13 - (26 + 21-18) = 13-29 = - 164: [1.4 - (- 3.6 + 5.2) - 4.3] - (- 1.5) = 1.4-1.6

Ask 4 practical questions
A and B do the addition. A adds an extra zero to one of the addends, and the sum of the two addends is 2342. B adds an extra zero to the same addend, and the sum of the two addends is 65
Party A and Party B make the same parts. If Party A makes the same parts for one day, and Party A and Party B make the same parts for five days, they will make the same number of parts. If Party A makes 30 parts first, and Party A and Party B work together for four days, Party B will make 10 more parts than Party A. how many parts should Party A and Party B make?
Boss Wang, a self-employed man, bought 500 kg of live fish and used 200 yuan of freight. When he sold the fish, 10% of the total fish died. When he sold the rest of the live fish at 6.5 yuan per kg, he still got 30% profit. He asked for the price per kg of fish when he bought it
Xiao Li's family has installed a time-sharing electricity meter. Every day from 6:00 a.m. to 22:00 p.m. is the full price period, with 0.5 yuan for each section of electricity. The rest of the time is half price period, and the price is 1 / 2 of the full price period. The power consumption of Xiao Li's half price period is 1 / 2 of the full price period all the time. A total of 165 yuan is paid this month. How much is Xiao Li's power consumption this month?

1. Let one addend be x and the other be y
X+10Y=2342
X+Y/10=65
Substituting into the calculation, we get x = 42, y = 230
2. Let a make x parts and B make y parts
1X+5X=5Y
30+4X=4Y-10
Substituting into the calculation, we get x = 50, y = 60
3. The price at the time of purchase is X
500X+200=[（500-500*10%)*6.5]/3
The result is x = 1.55
4. Let Xiaoli's half price power consumption be x and full price power consumption be y
X＝0.5Y
0.25X+0.5Y=165
Substituting into the calculation, we get x = 132, y = 264