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36×1.02+1.2×69.)
人气:485 ℃ 时间:2020-07-03 19:39:49
解答
36×1.02+1.2×69.4
=36×(1+0.02)+1.2×(70-0.6)
=36+0.72+84-0.72
=36+84
=20+16+84
=120
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