A runner's time falls from 12.8 seconds by 0.37 second. Enter the new time in seconds.
Respuesta correcta
12.43
Explicación
Write 12.8 as 12.80 and subtract aligned places: 12.80 - 0.37 = 12.43 seconds. Treating 0.37 as 0.037 by right-aligning its written digits would instead give 12.763 and subtract from the wrong places.