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Exercise "Adding - substracting", created by anonyme (a free exercise to learn Spanish):
Results of the 10 322 people who have taken this test:
Average mark: 73.5 / 100 Share
Latest member with a 100/100 (perfect mark): jackf / FRANCE, on Thursday 09 February - 19:05:
"Perfectooooooooooooooooooooooooooooooooooooo caballerooooooooooooooooooooooooooooooo"
They got a perfect mark
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