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30 September, 10:42

Which of these examples is an error of addition by one? *

4423 + 2572 = 6995

3122 + 5865 = 8987

5117 + 3672 = 8789

2674 + 5225 = 7889

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  1. 30 September, 10:50
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    The last one 2674 + 5225 = 7889 is the only one that isn't correct it should be 7899
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