赵杰3次跳远的平均成绩为128厘米,前两次平均成绩是126厘米,那么他第三次跳了多少厘米?

dxr0111092022-10-04 11:39:541条回答

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晓虎共回答了21个问题 | 采纳率76.2%: 您好~~很高兴为您解答~~
128×3-126×2=384-252
=132
∴他第三次跳了132厘米
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