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用度,分,秒表示77°42'+34°.45'= 108°18’-56°23’= 180°-(34°54‘+21°33’)=
人气:296 ℃ 时间:2019-08-19 23:59:20
解答
77°42'+34°45'=77+34 °42+45'=111°87'=112°27'108°18’-56°23’= 107°78'-56°23'=107-56°78-23'=51°55'180°-(34°54‘+21°33’)=180°-(34+21°54+33‘)=180°-55°87'=179°60'-56°27'=123°33...
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