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32/16=2
rpta:2
2)2,47 . 6,9 =17,043
3) 30/100 . 40/100 . 8000 (se simplifica)
3.40.8=960
rpta:960
4) 270.30/15=8100/15=540
rpta:540
5) 45/C=5k/7k
5k=45
k=9
c=7k
c=7.9
c=63
rpta:63