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(13×0.58-4.87+0.42×13-5.13)×4.25.

题目详情
(13×0.58-4.87+0.42×13-5.13)×4.25.
▼优质解答
答案和解析
(13×0.58-4.87+0.42×13-5.13)×4.25,
=(13×0.58+0.42×13-5.13-4.87)×4.25,
=[13×(0.58+0.42)-(5.13+4.87)]×4.25,
=[13×1-10]×4.25,
=[13-10]×4.25,
=3×4.25,
=12.75.