Greg had a rope one meter long. Greg and his friend Brad each cut off 0.2 meter of the rope to use in Greg's tree house. Greg cut off another 1/10 meter of the rope to use on a chair. What is the length of the rope in meters, that was left unused?
0.5 meters
Let's look at the problem and create an equation expressing it.
"Greg had a rope one meter long"
L = 1m
"Greg and his friend Brad each cut off 0.2 meter of the rope to use in Greg's tree house."
L = 1m - 0.2m - 0.2m
"Greg cut off another 1/10 meter of the rope to use on a chair. "
L = 1m - 0.2m - 0.2m - (1/10)m
Now solve for L
L = 1m - 0.2m - 0.2m - (1/10)m
L = 1m - 0.2m - 0.2m - 0.1m
L = 0.8m - 0.2m - 0.1m
L = 0.6m - 0.1m
L = 0.5m
So the amount of rope left unused is 0.5 meters
