把21,22,23,24,25,26,27,28,29这九个数填入O里,使每行、每列的三个数相加都等于75.
问题描述:
把21,22,23,24,25,26,27,28,29这九个数填入O里,使每行、每列的三个数相加都等于75.
答
把21,22,23,24,25,26,27,28,29这九个数填入O里,使每行、每列的三个数相加都等于75.