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

QuestionsCategory: MathFor some of these I think I have the right answer but I need a second opinion, Thanks
Lisa Howell asked 8 months ago
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

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