a |
3 |
b |
4 |
c |
5 |
a-b+c |
a+b-c |
a |
3 |
b |
4 |
c |
5 |
a-b+c |
a+b-c |
3k-4k+5k |
3k+4k-5k |
a |
b |
2 |
3 |
a |
a+b |
A.3﹕2 | B.2﹕5 | C.5﹕3 | D.3﹕5 |
a |
3 |
b |
4 |
c |
5 |
a |
b |
A.
| B.
| C.
| D.
|
A.1,2,3,4 | B.2,3,4,6 | C.1,3,5,7 | D.2,4,6,8 |
A.100m2 | B.270m2 | C.2700m2 | D.90000m2 |
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