For a rope, cut half a meter for the first time, two fifths of a meter for the second time, and how many meters for the second time

Total 1 / 2 + 2 / 5 = 9 / 10m
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1. An 8-meter-long rope, the first cut half of the court, the second cut two fifths of the meter, how many meters left
2. A rope is two fifths of a meter long. Cut off half of it in the first time, the remaining one-third in the second time, and the remaining one-quarter in the third time. How many meters is left in this rope
3. Simple calculation of one third times five sixteenth times three fifths
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8. What is the quotient obtained by subtracting two fifths from the difference between two and three fifths
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