The figure of a rectangular paper folded. The known angle 1 is 30 degrees, and the angle 2 is how many degrees I can't send the pictures. This question is the same as the one mentioned before, but I want the answer that can be solved in the fourth grade. Thank you

（180-30）/2=75

As shown in the figure, it is a figure obtained by folding a rectangular paper, where ∠ 1 = 75 ° and ∠ 2 = 2=______ °．

As shown in the figure, 180 ° - 75 ° × 2 = 180 ° - 150 ° = 30 °, so the answer is: 30

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