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4
5
×7.4−
4
5
+3.6×0.8
人气:451 ℃ 时间:2020-05-20 19:27:47
解答
4
5
×7.4−
4
5
+3.6×0.8

=0.8×7.4-0.8+3.6×0.8,
=0.8×(7.4-1+3.6),
=0.8×10,
=8.
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