546+785-146怎么简算?

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546+785-146怎么简算?546+785-146怎么简算?546+785-146怎么简算?546-146+785=400+785=1185

546+785-146怎么简算?
546+785-146怎么简算?

546+785-146怎么简算?
546-146+785
=400+785
=1185