圆的半径缩小3倍,圆的面积就缩小(?)倍.
圆的半径缩小3倍,圆的面积就缩小(?)倍.
数学人气：120 ℃时间：2020-04-11 10:07:28
优质解答
圆的半径缩小3倍,圆的面积就缩小(9)倍.
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