[img]2011q3/ct_egmatqj_egmatqchoose_0024_20111[/img]A、21/58B、58/21C、21D、42E、

游客2025-02-27 24

问题

选项 A、21/58
B、58/21
C、21
D、42
E、58

答案 D

解析 To divide by a fraction, just flip the top and bottom and multiply. So

turns into (3×7)+(7×3), or 21+21, which gives us 42.

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