math

Could someone double check my answers.
1. Write the number in expanded form
684

answer: (6x100)+(8x10)+(4x1)

2.Give the place value for the indicated digit
8 in the number 138,350

answer: thousands

3. Write the following in the standard form of a number
Four hundred sixty thousand, two hundred sourty-eight

answer: 460,248

4. Name the property of addition that is illustrated.
4+3=3+4

answer: communtative property of addition

5.Perform the idicated addition
23,132 + 54,055

answer: 77,187

6. Find the number that is 432 more than 1,443

answer: 1,875

7. perform the indicated addition
2,580+675+36

answer: 3,291

8. Do the indicated subtraction
44,377-25,058

answer: 19,319

9. Turner agrees to buy a boat for 2,800 down and $129 a month for 48 month. What is the total cost of the boat.

answer: $6,192

10. Estimate the result in the following divisors problem. ( Remember to round divisors to the nearest ten and dividends to the nearest hundreds).

answer: 19r4

11. You wish to cover a bathroom floor with 1-square foot(1-ft2) tiles that cost $2 each. If the bathroom is rectangular,6 ft by 7 ft, how much will the cost?

answer: $84

12. Choose the correct list of the factors of the number

answer: 1,2,4 and 8

12. Choose the correct list of prime numbers between 10 and 30

answer: 11,13,17,19,and 29

13. Choose the correct prime factorization of the number 117

answer: 3x3x13

14.Choose the correct greatest common factor of 16 and 24

answer: 2

15. Are 3/21 and 5/34 equivalent fractions?

answer: no

16. Divide 4 1/5 /14. Write the result in simple form

answer: 3/10

17. Find the reciprocal of 8/3

answer: 3/8

18. A computer can excute 64 instructions per microsecond. How many instructions can it execute in 10 minute?

answer: 384,000,000,000

19. You make $140 a day on a job. What will you receive for working 3/4 day?

answer: $105

20.Multiply 13/15 x 2/3. Write your answer in simple form

answer: 26/45

21. Multiply 3 1/6 x 9/11 x 6/17. Write your answer in simple form

answer: 1 171/187

22. Evalute 120 cal/g x4 4 g. Be sure to use the proper units

answer: 480 cal

23. Divide 6/25 / 2/15. Write the result in simplest form

answer: 4/125

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asked by Kim S.
  1. up to 10 ok
    #10 makes no sense

    #12 ???
    you have two #12's
    for the prime number one, you forgot prime 23

    #14 , 8 divides into both of your numbers

    Ps: could you not have checked most of these yourself with a calculator?

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    posted by Reiny
  2. aqyznjcxt tpyunzlx iljwexzo oduabgk ldbqzr uwepxqz jfgcdmp

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  3. choose the correct prime factorization of the number 117

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