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(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
人气:206 ℃ 时间:2020-02-06 05:05:07
解答
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)=(4.12+1.3)×(4.12+6.51)-(4.12+7.91)×4.12=4.12×4.12+1.3×4.12+4.12×6.51+1.3×6.51-4.12×4.12-7.91×4.12=1.3×4.12+1.3×6...
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