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2.22×9.9+6.6×6.7简算
人气：315 ℃　时间：2020-04-08 11:53:39
解答
2.22×9.9+6.6×6.7
=2.22×3.3X3+3.3X2×6.7
=6.66X3.3+13.4X3.3
=(6.66+13.4)X3.3
=20.06 X3.3
=66.198
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