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

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)

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

(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?

Okay thanks for the help :)

You're welcome.

(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.

8. no

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