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It probably should be 80 (because 5+5=10)

Hope it helps and pls mark as the best answer.

Hope it helps and pls mark as the best answer.

For the first one, it is 2, i.e., 1*2=2.

For the second, 3*2=6.

For the third, 4*2=8.

For the fourth, 5*2=10.

Therefore, one should be added to the ten's place.

Therefore, the answer is 80.

Thank you.

Hope this will help you.