Question

o numero de quilogramas (kg) em 81 arrobas

Answer 1

1 arroba ______ 15 kg
81 arrobas ____ X kg

x = 15 · 81 = 1215 kg

Answer 2

arroba     kg
  1          15
  81         x

x = 81.15
x = 1215 kg

   8 1
x 1 5
 4 0 5
 8 1 +
1 2 1 5