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数学
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(0.35乘58)加(65乘0.42) 简便运算
人气:499 ℃ 时间:2020-05-13 08:42:01
解答
0.35*58+65*0.42
=0.35*(100-42)+65*0.42
=35-0.35*42+0.65*42
=35+0.3*42
=35+12.6
=47.6
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