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1.2+2.3+3.4+4.5+5.6
12+23+34+45+56
人气:480 ℃ 时间:2020-02-01 08:36:15
解答
1.2+2.3+3.4+4.5+5.6
12+23+34+45+56

=
1.2+2.3+3.4+4.5+5.6
(1.2+2.3+3.4+4.5+5.6)×10

=
1
10
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