Question

por favor eu. preciso de ajuda

Answer 1

km²---hm²---dam²----m²-----dm²-----cm²-------mm²
1       00      00       00
           1      00       00    00        00

a)23 km² -------------------m²

1 km² ----------------------------1 000 000 m²
23 km²----------------------------- x
x = 23.000 000 m²
b)1 hm²------------------------------------100 000 000 cm²
   128 hm² ------------------------------------x
x = 12 800 000 000 cm²
c)1 dam²----------------------------------------100 000 000 mm²
3456 dam² -------------------------------------x
x = 345 600 000 000 mm²
d)456 m²-------cm²
1 m² -----------------------------------------------------10 000 cm²
456 m² --------------------------------------------------- x
x = 4 560 000 cm²
e)12345 mm²-------------dm²
1 dm²----------------------------------10 000 mm²
  x--------------------------------------12 345 mm²
x . 10 000 = 12 345
x = 12345 /10 000
x = 1,2345 dm²
f)1345,78 cm²--------hm²
1 hm² ---------------------------------------------100 000 000  cm²
  x---------------------------------------------------1345,78 cm²
x . 100 000 000 = 1345,78
x = 1345,78/100 000 000
x = 0,0000134578 hm²
g)0,678 m²--------km²
1 km² ------------------------------------------1 000 000 m²
 x-------------------------------------------------  0,678 m²
x . 1 000 000 = 0,678 m²
x = 0,678 /1 000 000
x = 0,000000678 km²
h)1,78905 dm²---------cm²
1 dm² -------------------------------------------------- 100 cm²
1,78905 dm²-------------------------------------------x
x = 1,78905 . 100
x = 178,905 cm²
i)2345,77 mm² -------dam²
1 dam² ------------------------------------------------------1 00 000 000 mm²
x --------------------------------------------------------------2345,77 mm²
x . 100 000 000 = 2345,77
x = 2345,77/100 000 000
x = 0,0000234577 dam²
j)5678,9 cm² ----m²
1 m²-----------------------------------------------10 000 cm²
  x ------------------------------------------------5678,9 cm²
x . 10 000 = 5678,9
x = 5678,9/ 10 000
x = 0,56789 m²