miscalculating
v.
（对数字、时间等）计算错误，算错( miscalculate的现在分词 );
（对…）判断错误;
例句:
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If the reactionaries think they can ever come round Marxists in this way, they're absolutely miscalculating.
要是反动派以为他们能这样来迫使马克思主义者就范, 他们是完全打错算盘了.
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"I would argue the Algerian regime is miscalculating monstrously, " he said.
来自BBC