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Please help me with these three questions, before my parents come home pls 50 points

Please help me with these three questions before my parents come home pls 50 points class=
Please help me with these three questions before my parents come home pls 50 points class=
Please help me with these three questions before my parents come home pls 50 points class=
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Answer:

24.04

Step-by-step explanation: Because 1 is not a decimal, it goes on the left side of 23.04. So 23 + 1 is 24. So 24.04

23.04

+ 1.00

-------------

24.04

1.  143.11

+   23.04

-----------------  add each number together example 4 +1 = 5, 0 +1 = 1

  166.15

2. 24.6

-  17. 2

------------  subtract each numbers together 6-2 = 4 and 24-17 is 7

7.4

3. 708.00   subtract the numbers together  

    - 22. 08

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685.92