I find that most of my careless errors happen when I take mental short cuts to save time. Stupid mistakes such as 750/3 = 150 by doing mentally or not reading that I need to solve for n+10 and solved for N instead and picked that as my answer.
How much work do you show and how do you decrease silly mistakes under a timed environment?
i try to show anything involving a variable - at least write the equation down so i have a reference. to reduce silly mistakes you just gotta keep doing problems to get better at not making them really.
How do you check your work, and how much time do you take doing so?
i try to make sure my calculations are correct and when i reach the same answer as the problem i usually just select it.
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