Respuesta :
we know that
nearest ten means multiple of 10
Like- 10 , 20 , 30 , 40
whichever is close
Here , we are given
18.57 trillion
and we know that
18.57 is between 10 and 20
but it is more close to 20
because difference between 18.57 and 20 is 1.43
while difference between 18.57 and 10 is 8.57
so, we always consider more close value
so,
18.57 trillion rounded to the nearest 20 trillion ...........Answer