For some of these I think I have the right answer but I need a second opinion, Thanks :)

(1). 223.7 km=_m.
A} 223,700 ***(I multiplied by 100)
B} 22,370
C} 22.370
D} 0.2237

(2).Write the metric unit that makes the statement true.
3.219m=3,219___
^cm****(Not sure)
^dm
^km
^mm

(3). Use benchmarks to estimate the sum,difference, or product
14/16+1/5
^2
^0
^1/2***
^1

(4). 5 2/11- 3 2/18
^3***
^1
^4
^2
(5). Use benchmarks to estimate the sum, difference, or product.
7 2/7 x 3 7/9
^32
^28****( not completely sure)
^24
^21
(6). Find the sum.
2/9+4/9
^1
^2/3
^6/81
^1/3****(Not completely sure)
(7). -6/7+6/21
^-4/7***
^12/49
^-1 3/7
^12

(8). 12 1/9+ 10 2/3

^22 1/6****
^22 7/9
^22 1/9
^22 1/4
(9). -1/5+(-3/7)
^-22/35
^-1/3
^12/35
^4/7
(10). 4/9-1/3
^1/27
^1/9
^1
^5/27****
(11). -3 5/9-1 3/9
^-4 2/9
^-4 8/9
^2 1/9
^2 2/9

(12). 5 2/3-4 5/9
^1 1/9****
^8/9
^1 1/2
^3/4

1. no - 1 km = 1000 m

2. yes
3. no
4. no
5. yes
6. no
7. yes

ok thanks ms.sue, what about the second set?

8. no

9. ?
10. no
11. ?
12. yes

Okay thanks for the help :)

You're welcome.

omg im tired of this vrap ima about go mad right now that is no help where are the other people to help hu were are they help a student with 18 but that cant help with this amount yall wack and trash and ms sue youre not helping

1. A - 223,700

2 - got wrong didn't show answer ( not cm)
3 - got wrong(not 1)
4 C - 5
5 - got wrong (not 24)
6 B - 2/3
7 A - -4/7
8 B - 21 8/9
9 A - -22/35
10 C - 1/14
11 B - -4 8/9
12 D - 2 5/18
13 - got wrong (not 0)
14 - got wrong (not 20 2/5)
15 C - 9
16 C - 1/25
17 C - -8 2/5
18 D - 1 13/21
19 B - 4/7
20 C - 28/33
21 D - 8
22 A - -2 19/33
23 A - 43 fl oz
24 C - 5 5/12 ft
25 A - 2 7/8 yd
26 and 27 write outs (we all hate them)

(1). To convert kilometers to meters, you need to multiply by 1,000 since there are 1,000 meters in a kilometer. So, the correct answer is A} 223,700.

(2). To convert meters to centimeters, you need to multiply by 100 since there are 100 centimeters in a meter. So, the correct answer is ^cm.

(3). To estimate the sum of fractions, find a common benchmark or a number that both fractions are close to. For example, 14/16 is close to 1 (16/16) and 1/5 is close to 1/2 (8/16). So, the closest benchmark sum is 1/2. The correct answer is ^1/2.

(4). Subtracting mixed numbers can be tricky. One way to estimate the answer is to take the whole numbers and subtract them separately, then subtract the fractions. So, 5 - 3 is 2 and 2/11 - 2/18 can be approximated as 2/11 - 1/9, which is about 1/11. So, the correct answer is ^3.

(5). Similar to the previous question, you can estimate the product by rounding the numbers. 7 2/7 is approximately 7, and 3 7/9 is close to 4. So, the estimated product is 7 x 4 = 28. The correct answer is ^28.

(6). To find the sum of fractions, you need to have a common denominator. In this case, the denominators are the same, so you can simply add the numerators. 2/9 + 4/9 equals 6/9, which can be simplified to 2/3. So, the correct answer is ^2/3.

(7). To add fractions, you need a common denominator. In this case, the common denominator is 7. -6/7 + 6/21 can be rewritten as -18/21 + 6/21, which equals -12/21. Simplifying this fraction gives -4/7. So, the correct answer is ^-4/7.