2.86 2.54 2.65 3.32 2.58 2.70 2.68的平均数是多少?
人气:332 ℃ 时间:2020-03-21 01:38:23
解答
2.86+2.54+2.65+3.32+2.58+2.70+2.68=19.33
19.33÷7=2.76
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