Question
Adam has 80 cm of thread.
He uses 50 cm of thread.
He cuts the remaining thread into length of 3 cm each.
How many 3-cm pieces of threads are there?
4 m

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Adam has 80 cm of thread.
He uses 50 cm of thread.
He cuts the remaining thread into length of 3 cm each.
How many 3-cm pieces of threads are there?